If Z is a standard normal variable, use Z table to find the following probabilities:

a. P (Z < 0) b. P (-1.5 < Z < -1)

c. P (Z > 2.54)

d. P(Z<2.54)

The variable Y is normally distributed with a mean of 75 and a variance of 625. Find the following probabilities using Z table: P (50 Y 100)

P (Y > 85)