ƚ@ P] _ .  @& & MathType- Times New Romanww 0wfh-2  2y2 R1yTimes New Romanww 0wfh-2 n2yTimes New Romanww 0wfh-2 Jby2 by2 nAy2 `:hySymbol Šww 0wfh-2 0+y2 ``=y & "Systemhfh !-