We are often interested in finding the value of z that bounds a given area in the

Question:

We are often interested in finding the value of z that bounds a given area in the right-hand tail of the normal distribution, as shown in the accompanying figure. The notation z(a) represents the value of z such that
P(z > Z(a)) =
a. Find the following:
z (0.025)
b. z(0.05)
c. z(0.01)