ƚ .Z 0 .1   & & MathType-`TTimes New Roman Cyrgw0 y -2 `,y2 `P1yTimes New Roman Cyrgw 8 -2 zay2 nzqy2 `4eySymbol0 z|w|wgw0 z -2 `:-y2 `B=y & "Systemw7 f  -