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

a. One tail test, z_x = 1.50, and σ = 0.05

b. One tail test, z_x = 2.25, and σ = 0.02

c. Two tail test, z_x = 2.10, and σ = 0.05

d. Two tail test, z_x = 1.37, and σ = 0.10