1 1

E

-:..

1 . .

(10 )

B. () () . 1. . 2. 2 5 9.

(10 )

2 ( ) (=) . : . . (10 ) . = (5 ) . . (15 ) . . (10 )

. . (10 )

K

3 ( ) (,R) . =. .