Calculate the p-value for the following conditions and determine whether to reject the null hypothesis:

a. one-tail test, zx = 1.50, and a = 0.05

b. one-tail test, zx = -2.25, and a = 0.02

c. two-tail test, zx = 2.10, and a = 0.05

d. two-tail test, zx = -1.37, and a = 0.10 AppendixLO1