??????????????

????:???????????:????

????7?????8??????? (??? ????????)7?????????8???????????,?????

???????????????????????????????? ?

???,???????????,????(????????????)??????????(??)???????(??????)3??????????????????

?????????????????????3????,??????????????????????3???????????????????,??????????5????????29??????????????3?????????,????????1????????????????????????????????????3?,?????3????,???8????

?????? ?

????,????????????????,???????,???????2.83???????????,???3.88????

????????????,???????????????????????,???,????(?????????)

???:??????