: ● 100 ● 100 ● 0.5 () ● 1 ● 2 ● 1 . ● 1 . ● 0.5 . ● 0.5 . ● 0.5 . ● 0.5 . ● 0.5 . : 1. . ( ) . 2. , , , , , , . . . 3. 180 . ( ) 0.5 . , . 4. 180 8-10 . , 2 , 200-250 . .