/

:
:
:
:

. !
 
  (250 .)

" ". 4- .
1) , v = 1,0 /, b = 0,10 ( 4.3). , ...
...
  (350 .)

1. - 10 . . ...
...

  C /

:


SSL

?

?



:
Z-PAYMENT VISA Card MasterCard Yandex WebMoney     SMS  24 qiwi PayPal

50 ...


   ?



    WM  782443000980


  ,  !