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(a)
P (Z > -1.62 ) = 0.94738
(b)
P (Z ≤ 1.72) = 0.95728
(c)
P (-058 < Z < 1.91 ) = 0.69097
Z<1.91 = 0.97193
Z<-0.58 = 0.28096
0.97193 - 0.28096 = 0.69097