1. . , .
.
.
,
2. , a, b .
.
.
,
: |
1. . , . . . , 2. , a, b . . . , |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
: 0.065 . |