[PUBLISH]

                        IN THE UNITED STATES COURT OF APPEALS

                               FOR THE ELEVENTH CIRCUIT           FILED
                                ________________________ U.S. COURT OF APPEALS
                                                                        ELEVENTH CIRCUIT
                                                                           APRIL 11, 2012
                                       No. 10-12480
                                                                            JOHN LEY
                                 ________________________
                                                                             CLERK

                            D.C. Docket No. 1:09-cr-00240-KD-N-1

UNITED STATES OF AMERICA,

lllllllllllllllllllll                                              Plaintiff - Appellee,

                                           versus

JOSE NORIEGA,

lllllllllllllllllllll                                              Defendant - Appellant.

                                  ______________________

                          Appeals from the United States District Court
                             for the Southern District of Alabama
                                 ________________________

Before TJOFLAT and CARNES, Circuit Judges, and MICKLE,* District Judge.

CARNES, Circuit Judge:

         Jose Noriega was convicted of conspiracy and possession of marijuana with

intent to distribute. He has appealed, contending that the district court should


         *
         Honorable Stephan P. Mickle, United States District Judge for the Northern District of
Florida, sitting by designation.
have suppressed evidence seized at his property because, he argues, the search was

illegal and, in any event, the evidence was insufficient to support his conspiracy

conviction. An alternative ground may justify affirming the district court’s

decision not to suppress the evidence, regardless of whether the search was illegal.

Because we do not have the facts necessary to decide the suppression issue on that

alternative ground, we do not yet know if it will be necessary to decide whether

the search was illegal. And because we are not yet deciding the suppression issue,

we do not know what evidence to consider in order to decide the sufficiency issue.

So, we are sending the case back to the district court for additional factfindings

before we decide the suppression and sufficiency issues.

                                          I.

      This story begins with a phone call from an anonymous tipster to a drug task

force in Mobile County, Alabama, reporting that people were growing marijuana

at three properties within three miles of each other in Eight Mile, an

unincorporated community named for its distance from Mobile, Alabama. The

tipster said that on each of the three properties, in addition to a house, there was an

outbuilding equipped with large air conditioners.

      A few days later, six or seven police officers led by Corporal Wilbur

Williams went to the properties to investigate the anonymous tip. The first

                                           2
property the officers went to was located on Jib Road. Two vehicles were parked

in the driveway, and there were security cameras on the corners of the house. The

property also had an outbuilding behind the house, just as the tipster had alleged.

      Corporal Williams obtained an oral search warrant for the Jib Road house

from Alabama state court Judge George Hardesty. See Ala. R. Crim. P. 3.8(b)

(permitting a judge to issue a search warrant upon oral testimony if circumstances

make it reasonable to dispense with a written affidavit). When they served the

warrant the officers found inside the house a marijuana growing operation,

including high-intensity lighting equipment, voltage-boosting ballasts used to

power that lighting equipment, timers, and 119 marijuana plants. In one of the

rooms they found surveillance monitoring equipment and a .30-06 rifle with a

scope. Williams ran the license plates of the two vehicles parked in the driveway,

and one was registered to Juan Sabina.

      Corporal Williams called Judge Hardesty and reported what he and the other

officers had found inside the house and obtained an oral search warrant for the

outbuilding. Officers then searched the outbuilding and found “remnants of a

[marijuana] grow[ing] operation,” including whole marijuana plants, fragments of

other marijuana plants, and two 5-ton air conditioners attached to the outbuilding.

Those two air conditioners were each powerful enough to cool a house about twice

                                          3
as large as the outbuilding, and they were used to counteract the heat from the

high-intensity lighting equipment, which might otherwise burn the marijuana

plants.

      Corporal Williams and some of the other officers then went to the second

property that had been identified in the anonymous tip, located on Chutney Drive.

There they found Omar Huezo, Juan Sabina, and Jose Noriega on the back porch

drinking beer. Sabina, the only one of the three who spoke English, told Williams

that Noriega owned the Chutney Drive property, and Huezo, with Sabina

translating, told Williams that he lived at the Jib Road property.

      Based on the anonymous tip, the fact that Sabina, who owned one of the

vehicles parked in the driveway at the Jib Road property, was present at the

Chutney Drive property, and Huezo’s statement that he lived at the Jib Road

property, Corporal Williams concluded that those two properties at Jib Road and

Chutney Drive were connected to a single criminal conspiracy. Because of that

conclusion, and aware that a surveillance system and a rifle with a scope had been

found inside the Jib Road house, Williams was concerned that someone posing a

threat to the officers’ safety might be hiding inside the Chutney Drive house. So

he entered the house and walked through it to ensure that no one was hiding

inside. During this “protective sweep,” Williams saw in plain sight the same type

                                          4
of high-intensity lighting equipment, ballasts, and a timer that he had seen at the

Jib Road property. There were, however, no marijuana plants being grown inside

the Chutney Drive house at that time.

      Just as the tipster had alleged, the Chutney Drive property also had an

outbuilding, which was located 50 to 75 yards behind the house and was separated

from the backyard by a fence. After conducting the protective sweep of the house,

Corporal Williams walked around the outbuilding and smelled an “overwhelming

pungent odor of fresh marijuana.”

      At this point, Corporal Williams prepared a handwritten search warrant

affidavit in support of a warrant for the Chutney Drive property. The affidavit

stated that Williams had received an anonymous tip that the Chutney Drive

property and two other properties had marijuana growing operations and that he

had already spoken with Judge Hardesty to request search warrants for the house

and outbuilding at the Jib Road property, the first property mentioned in the

anonymous tip. Williams’ affidavit also included the fact that during his

protective sweep of Noriega’s house he had seen in a bedroom “the same elaborate

electrical system that [he had] observed in the grow rooms at the [Jib Road]

location” and that he had “encountered a strong odor of fresh marijuana. . . .

[coming] from inside the” outbuilding at the Chutney Drive property. Williams

                                          5
called Judge Hardesty, read him the affidavit, and requested an oral search warrant

to search the house and the outbuilding, which Judge Hardesty issued.

      Officers then searched the house and the outbuilding at Chutney Drive.

Inside the outbuilding, they found a “very large and elaborate marijuana grow[ing]

operation,” including high-intensity lighting equipment and ballasts, identical to

what they had found at the Jib Road address, and 245 marijuana plants. And,

consistent with the anonymous tip, attached to the outbuilding were two 5-ton air

conditioners. Inside the Chutney Drive house, officers seized and removed the

“elaborate electrical system” that Corporal Williams had seen during his protective

sweep, as well as something he had not seen: a .22 caliber rifle located near a

kitchen window that looked out to the outbuilding.

      Corporal Williams and some of the other officers then went to the last

property mentioned by the anonymous tipster, located on Kushla McLeod Road.

After obtaining yet another oral search warrant from Judge Hardesty, the officers

uncovered a marijuana growing operation on the property similar to those at the

Jib Road and Chutney Drive properties, including high-intensity lighting

equipment, ballasts, timers, an outbuilding with one 5-ton air conditioner attached

to it, a garage with another 5-ton air conditioner attached to it, and 160 marijuana

plants.

                                          6
                                               II.

       A federal grand jury returned a superseding indictment that charged

Noriega, Sabina, Huezo, and four other defendants with conspiracy to possess

marijuana with intent to distribute in violation of 21 U.S.C. §§ 841(a)(1), 846, and

possession of marijuana with intent to distribute in violation of 21 U.S.C. §

841(a)(1). It also charged Noriega and Huezo with knowingly possessing a

firearm in furtherance of a drug trafficking crime in violation of 18 U.S.C. §

924(c)(1), and it included a forfeiture count, see 21 U.S.C. § 853.1

       Before trial Noriega moved to suppress the evidence seized at his Chutney

Drive property, arguing that Corporal Williams conducted an illegal protective

sweep of his house and that Williams violated the Fourth Amendment when he

walked around the outbuilding without first obtaining a search warrant. The

district court denied the motion, finding that Williams’ actions were lawful

because “articulable facts” led Williams to feel “a heightened sense of danger to

the officers.” Those articulable facts were that he was “[i]mbued with the

       1
         One defendant remains a fugitive. Huezo pleaded guilty to the conspiracy charge and to
the charge of possessing a firearm in furtherance of a drug trafficking crime, and two other
defendants pleaded guilty to the conspiracy charge. Noriega, Sabina, and one other defendant
went to trial, but the district court granted that other defendant’s motion for a judgment of
acquittal after the government’s case-in-chief. Sabina was convicted of conspiracy and appealed
his conviction, contending that the evidence was insufficient to support the jury’s verdict. In a
separate opinion issued today, we are affirming Sabina’s conviction. See United States v.
Sabina, — F. App’x —, No. 10-12604 (11th Cir. April 11, 2012) (unpublished).

                                                7
knowledge of the corroborated tip, the discovery of the large marijuana grow[ing

operation] at Jib Road, the high powered rifle positioned close to [the]

surveillance monitor [at Jib Road], and . . . the connection of the Chutney [Drive]

residence to the Jib Road residence.”

      The jury found Noriega guilty of both conspiracy to possess, and possession

of, marijuana with intent to distribute but acquitted him of the charge of

knowingly possessing a firearm in furtherance of a drug trafficking crime. The

presentence investigation report calculated a total offense level of 22 and a

criminal history category of I, which generally would lead to a guidelines range of

41 to 51 months imprisonment. But the mandatory minimum prison sentence for

each conviction was 60 months, see 21 U.S.C. §§ 841(b)(1)(B), 846, and that

became the guidelines range as well, see United States Sentencing Guidelines §

5G1.1(b) (Nov. 2009). The district court sentenced Noriega to 60 months on each

of the two counts of conviction, with each sentence to run concurrently, imposed a

5-year term of supervised release, and ordered him to forfeit his Chutney Drive

property.

                                         III.

      Noriega’s first contention is that admission at trial of the evidence seized

from his house and outbuilding on Chutney Drive in Eight Mile violated the

                                          8
Fourth Amendment. We review a district court’s denial of a defendant’s motion to

suppress evidence as a mixed question of law and fact. United States v. Perez, 

, 581 (11th Cir. 2011). We review only for clear error the court’s findings

of fact, but we review de novo the court’s application of the law to those facts.

United States v. Caraballo, 

, 1222 (11th Cir. 2010).

                                           A.

      The Fourth Amendment protects “[t]he right of the people to be secure in

their persons, houses, papers, and effects, against unreasonable searches and

seizures,” and provides that “no Warrants shall issue, but upon probable cause.”

U.S. Const. amend. IV. The Amendment, though, is silent about how one’s “right

. . . to be secure” is to be enforced. See Davis v. United States, — U.S. —, 

, 2423 (2011). “To supplement the bare text, th[e Supreme] Court

created the exclusionary rule, a deterrent sanction that bars the prosecution from

introducing evidence obtained by way of a Fourth Amendment violation.” 

“also prohibits the introduction of derivative evidence . . . that is . . .

acquired as an indirect result of the unlawful search.” Murray v. United States,

, 536–37, 

, 2533 (1988).

      The “chief evil against which” the Fourth Amendment is directed is a

government agent’s warrantless physical entry of a person’s home, see Coffin v.

                                            9
Brandau, 

, 1009 (11th Cir. 2011) (en banc), but the Amendment’s

words “do[] not mean . . . that all searches and seizures require the issuance of a

warrant,” United States v. Goddard, 

, 1362 (11th Cir. 2002). The

Amendment, for example, allows some warrantless protective sweeps of a

defendant’s home to ensure the safety of police officers and others. Maryland v.

Buie, 

, 336–37, 

, 1099–1100 (1990). “A protective

sweep is a quick and limited search of premises, incident to an arrest and

conducted to protect the safety of police officers or others. It is narrowly confined

to a cursory visual inspection of those places in which a person might be hiding.”

110 S.Ct. at 1094 (quotation marks omitted). Under the Supreme

Court’s decision in Buie, a police officer may perform a protective sweep of a

defendant’s home when there are “articulable facts which, taken together with the

rational inferences from those facts, . . . warrant a reasonably prudent officer in

believing that the area to be swept harbors an individual posing a danger to those

on the arrest scene.” 

110 S.Ct. at 1098; see also 

–25 (approving of a protective sweep that was not incident to an arrest).

                                          B.

      Noriega contends Corporal Williams violated the Fourth Amendment when

he conducted a protective sweep of the Chutney Drive house and when he walked

                                          10
around the property’s outbuilding. According to Noriega, the district court should

have suppressed all of the evidence seized at his Chutney Drive property under the

exclusionary rule because Williams used what he had seen during his protective

sweep of the house (the “same elaborate electrical system that [he had] observed”

at the Jib Road property) and what he had smelled coming from the outbuilding (a

strong odor of marijuana) to obtain the search warrant under which the evidence

was seized.2

       “The legality of the protective sweep is a difficult question. It requires

balancing two deeply important interests—the lives of law enforcement officers

and the constitutional right of the people to be secure in their homes under the

Fourth Amendment.” United States v. Delancy, 

, 1307 (11th Cir.

2007). We can, however, affirm a district court’s denial of a motion to suppress

on any ground supported by the record, 

, so this case

may not require us to decide the difficult question of whether Williams’ protective

sweep of Noriega’s house complied with the Fourth Amendment.3


       2
        Noriega contends for the first time in his reply brief that the evidence found at his
property should be suppressed because the officers came onto his property without first obtaining
a search warrant. That contention is forfeited because Noriega did not raise it in his opening
brief. See United States v. Lopez, 

, 1246 (11th Cir. 2011).
       3
        The government argues that the protective sweep’s legality is not a difficult issue
because Williams testified at the suppression hearing that Noriega, speaking through Sabina,
consented to the protective sweep of his house. However, during the suppression hearing the

                                               11
                                              C.

       Even if the protective sweep was not permitted, it may be that the evidence

in question was properly admitted anyway under the independent source exception

to the exclusionary rule. Under that exception, evidence obtained from a lawful

source that is independent of any Fourth Amendment violation is admissible, the

rationale being that the exclusionary rule should not put the government in a worse

position than if the constitutional violation had not occurred. See 

, 108 S.Ct. at 2533; see also Nix v. Williams, 

, 443, 

, 2509 (1984) (“When the challenged evidence has an independent

source, exclusion of such evidence would put the police in a worse position than

they would have been in absent any error or violation.”).

       When a government agent makes an initial warrantless entry that arguably

violates the Fourth Amendment and then relies in part on what he saw during that

entry to obtain a search warrant, we apply a two-part test to determine whether

evidence seized during the execution of the warrant was discovered independent

of the initial entry and is therefore admissible regardless of whether that first entry

violated the Fourth Amendment. See United States v. Chaves, 

,



government conceded that it was “not in a position to prove [consent],” and we will not permit
the government to undo its concession.

                                               12
692–93 (11th Cir. 1999). The first thing we do is excise from the search warrant

affidavit any information gained during the arguably illegal initial entry and

determine whether the remaining information is enough to support a probable

cause finding. See 

remaining or nonexcised information is enough to

support a probable cause finding, the second thing we do is determine whether the

officer’s decision to seek the warrant was “prompted by” what he had seen during

the arguably illegal entry. 

, 108 S.Ct. at 2536; see also

. To determine whether an officer’s decision to seek a

warrant is prompted by what he saw during the initial entry, courts ask whether the

officer would have sought the warrant even if he had not entered. 

n.3. If the officer would have done so, his

decision to seek the search warrant is supported by an “independent source,” and

the evidence seized under the warrant is admissible regardless of whether the

initial entry violated the Fourth Amendment. See 

–93.

      So, the first issue along this alternative route for deciding the case is

whether, excluding any information gained by Corporal Williams’ protective

sweep of Noriega’s house, there was still probable cause to support a search

warrant for that house and the outbuilding. “A sufficient basis for probable cause

for a search exists when under the totality of the circumstances there is a fair

                                          13
probability that contraband or evidence of a crime will be found in a particular

place. A fair probability, in turn exists when the facts and circumstances would

lead a reasonably prudent person to believe that the place to be searched contains

contraband or evidence of a crime.” United States v. Lopez, 

, 1245

(11th Cir. 2011) (alteration, citations, and quotation marks omitted). And

“[p]robable cause may be based on facts within the magistrate’s knowledge and of

which he has reasonable trustworthy information.” United States v. Slay, 

, 1095 (11th Cir. 1983).

      The only thing in Corporal Williams’ affidavit about what he saw in

Noriega’s Chutney Drive house is his statement that there was “a bedroom that

contained the same elaborate electrical system that [he had] observed in the grow

rooms at [Jib Road].” Subtracting out that statement, the affidavit still recounted

that: (1) Williams had received an anonymous tip that there were marijuana

growing operations at the Chutney Drive property and two other locations; (2) he

had already spoken with Judge Hardesty about the anonymous tip (and, other

evidence shows, had informed the judge that the officers had found a marijuana

growing operation inside the Jib Road house); and (3) Williams had “encountered

a strong odor of fresh marijuana” as he walked around the Chutney Drive

outbuilding.

                                         14
      Even without the statement about what Corporal Williams saw in the house

during the protective sweep, the remaining information in the affidavit informed

Judge Hardesty that: (1) an anonymous tip had indicated that the Chutney Drive

property and two others were being used to grow marijuana; (2) the officers had

found a marijuana growing operation inside the house at the Jib Road property, the

first property mentioned in the anonymous tip; and (3) Williams had smelled a

strong odor of marijuana coming from the outbuilding that was 50 to 75 yards

behind the house on the Chutney Drive property. Those “facts and circumstances

would lead a reasonably prudent person to believe that” the Chutney Drive house

and outbuilding contained evidence of a crime. 

. Even

excluding the information gained from Williams’ protective sweep of Noriega’s

house, the affidavit still supplied probable cause to support the search warrant.

      Noriega, however, contends that we should not consider in our independent

source probable cause analysis the fact that Corporal Williams smelled a strong

odor of marijuana coming from the outbuilding because, he argues, Williams

violated the Fourth Amendment by walking around that outbuilding before

obtaining a search warrant. If the outbuilding was within the curtilage of

Noriega’s house at Chutney Drive, it was “entitled to the same protection against

unreasonable search and seizure as the [house] itself.” United States v. Taylor,

                                         15


, 1206 (11th Cir. 2006). If the outbuilding was located beyond the

curtilage of Noriega’s house, however, it was not entitled to that protection, and

Williams did not need a search warrant to walk around it. See United States v.

Jones, — U.S. —, 

, 953 (2012) (holding that a government agent’s

physical intrusion on an area beyond the home’s curtilage “is of no Fourth

Amendment significance”); 

.

      A home’s curtilage, “[t]he private property immediately adjacent to a

home[,] is entitled to the same protection against unreasonable search and seizure

as the home itself.” 

. This area though is not unlimited,

and “the extent of the curtilage is determined by factors that bear upon whether an

individual reasonably may expect that the area in question should be treated as the

home itself.” United States v. Dunn, 

, 300, 

, 1139

(1987). “The [Supreme] Court in Dunn identified four factors that assist us in

resolving this question: (1) the proximity of the area claimed to be curtilage to the

home; (2) the nature of the uses to which the area is put; (3) whether the area is

included within an enclosure surrounding the home; and[] (4) the steps the

resident takes to protect the area from observation.” 

.

      An analysis of those four factors leads us to the conclusion that the

outbuilding was far enough out to be beyond the curtilage of Noriega’s house. “In

                                         16
Dunn, the Supreme Court held that a barn, used for storing chemicals, located

some sixty yards from the house was not located within its curtilage for Fourth

Amendment purposes.” 

(citing 

, 107 S.Ct. at

1134). Here, as Noriega concedes—and undisputed testimony from the

suppression hearing and the trial establishes—the outbuilding was located 50 to 75

yards away from the house. The substantial distance between the house and

outbuilding supports the conclusion that it was not within the curtilage of the

house. See 

, 107 S.Ct. at 1140; see also 

.

        The other three factors also support this conclusion. An area is more likely

to be within the curtilage of a home if it is “used ‘for intimate activities of the

home.’” 

(quoting Dunn, 

–03, 107 S.Ct. at

1140). There is no indication that Noriega used the outbuilding for intimate

activities; instead, it was used to grow marijuana. Criminal activity is not intimate

activity, at least not in this instance. See 

information that

the outbuilding was not being used for intimate activities came in the form of: the

anonymous tip that three properties, each with a house and outbuilding, were

being used to grow marijuana; the partial corroboration of that tip at the Jib Road

property by the discovery of the remnants of a marijuana growing operation inside

                                           17
the outbuilding; and the presence at the Chutney Drive property of Sabina, the

owner of one of the vehicles parked at the Jib Road property, and Huezo, who said

that he lived at the Jib Road property. See 

–03, 107 S.Ct. at

1140. Similarly, the fence that separated the outbuilding from the backyard also

separated the outbuilding from the “clearly marked . . . area around the home.” Id.

at 

(quotation marks omitted). And there is no evidence that

Noriega took steps to protect the outbuilding from observation. See 

107 S.Ct. at 1140; 

.

      In light of these factors, Noriega did not have a reasonable expectation that

the outbuilding should be treated like his house. The outbuilding was not within

the “curtilage” of his house, and Corporal Williams did not violate the Fourth

Amendment when he walked around the outbuilding before obtaining a search

warrant. Therefore, the evidence that Williams smelled a strong odor of marijuana

coming from the outbuilding should be considered in the independent source

analysis.

       The remaining question in that analysis is whether Corporal Williams’

“decision to seek the warrant was prompted by what [he saw] during” the

protective sweep. 

& 

& n.3; see

also 

. Would he have sought the search warrant even if he

                                        18
had not conducted the protective sweep? That is a question of fact, see Murray,

–43, 108 S.Ct. at 2536, which the district court did not resolve when

ruling on Noriega’s motion to suppress. Noriega urges us to find that Williams’

protective sweep of the house prompted him to seek the warrant based on what he

characterizes as the “temporal proximity of the ‘sweep’ and the request for the oral

warrant.” Appellant Reply Br. 9. “We, however, are not factfinders,” Didie v.

Howes, 

, 1104 (11th Cir. 1993), and “we will not substitute

ourselves for the district court as [the] factfinder” in this case, United States v.

Fulford, 

, 1181 (11th Cir. 2011).

      Because it is the district court’s role to find the facts, we will remand the

case to that court for the limited purpose of allowing it to find whether Corporal

Williams would have sought the oral search warrant for the Chutney Drive house

and outbuilding if he had not already conducted the protective sweep of that

house. If Williams would have sought the warrant anyway, the district court did

not err in denying the motion to suppress under the independent source exception

to the exclusionary rule, and we can move on to Noriega’s sufficiency of the

evidence claim, which we do not reach at this time. But if Williams would not

have sought the warrant anyway, we will have to decide whether the district court

erred in determining that the protective sweep of Noriega’s house did not violate

                                           19
the Fourth Amendment. We leave it to the district court to determine whether to

hear any additional testimony from Williams or any other witness on the question.4

                                                III.

       For the reasons we have discussed, we REMAND this case to the district

court for the limited purpose of having it make the factfinding or factfindings on

the question we have described. After the district court has entered its findings,

the case should be returned to this Court, and the Clerk’s Office will refer it to this



       4
         Noriega makes two more arguments that the district court erred by not suppressing the
evidence seized at his Chutney Drive property, but neither one is persuasive. First, he argues that
the district court should have suppressed the evidence seized pursuant to the oral search warrant
for his property because that warrant violated the reasonableness requirement governing the
issuance of an oral search warrant under Alabama Rule of Criminal Procedure 3.8. That
Alabama rule requires that, before a judge may issue an oral search warrant, circumstances must
“make it reasonable to dispense . . . with a written affidavit.” Ala. R. Crim. P. 3.8(b)(1). But it
also provides that, “[a]bsent a finding of bad faith, evidence obtained pursuant to a warrant
issued under this paragraph is not subject to a motion to suppress on the ground that the
circumstances were not such as to make it reasonable to dispense with a written affidavit.” Ala.
R. Crim. P. 3.8(b)(7). Even if the circumstances did not make it reasonable to dispense with a
written affidavit, the district court was not required to suppress the evidence on the ground that
the state rule had been violated because federal law, not state law, governs the admissibility of
evidence in federal court, and “complaints that the evidence was obtained in violation of state
law are of no effect.” United States v. Glinton, 

, 1252 (11th Cir. 1998) (quotation
marks omitted). And even if state law governed the admissibility of evidence in federal court,
the district court found that Williams did not act in bad faith in requesting the oral warrant, and
we are not persuaded that finding was clearly erroneous.

       Noriega also contends that Judge Hardesty did not make a verbatim record of the
conversation he had with Corporal Williams after Williams requested the oral search warrant for
Noriega’s property, in violation of Ala. R. Crim. P. 3.8(b)(4). As we have already mentioned,
however, the district court was not required to suppress evidence due to a violation of a state law
rule. See 

.


                                                20
panel which retains jurisdiction over the appeal. See Ballard v. C.I.R., 

, 1027 & n.1 (11th Cir. 2005).




                                        21