??? ? ? ?10-16 . ??? ? , ?
?? ?? ? ? ? ? ??? ?, ? , ?. ?? ? ? ?, , ??, ? ?,5.
? ? , ?????? ??????? ? ?? ???? ?? ?? , ???(?? ? .
, ???? 2 ? ???? ??? ??
? ? ???, ??, , 15 .
1??? 2?? ?? ??, ? . ?? ?? ?? 15 .
2??? ??? ? ?? ?1 ????= ? 15 ( 1)
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. ????? 2 , 1 ( 2).
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? ? ? - ? ???? ( ? ) ?? ( 3)
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. ? ??? ?. ?? ?
?? ? ? - ? , ???? ? ?, ???? ???? ? ? ?.
?10-15 ????? ?? (??? ?. , ? , ????? ? ? ??( 4) :
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???? ???. ??? ( 5)
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?????? ??:
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