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

a. one-tail (upper) test, zp = 2.15, and a = 0.10

b. one-tail (lower) test, zp = -0.66, and a = 0.05

c. two-tail test, zp = -1.69, and a = 0.05

d. two-tail test, zp = 1.44, and a = 0.02 AppendixLO1