ͨ
: ( 20 ): ● 8 .. ● 7 .. ● 4 .. ● 2 ● 6 .. ● 6 .. ● .. ( ) ● c ● 5 . . : , . ( ) . . : ● 300 (20%) ● 5 .. ● 20 ● 1 .. "" : 0,75 . . , . . . :4 .. 1 .. 2 . . , ,- . .