,
:175/50 , 90/50 . 4 , 21 × 10 . 54-55 . 96 +1 ( ) 11 5-6 . , . . + .. – .. - . , , . , , , . ~15/16 . . 21 . : 1 . 2 . (1 ) 2 . . 3 . 2 . . . . , .