6613. =1 , m = 50 . , .
,
= 100 k=1/
()
, . I1 = 1 A, ?1 =30.
() ( ) , () l (.0 - 7)
6625. , , m2 =1 m3 = 5 . , , m2, .
:
5. . . . . . . . .
6 18 -
: .