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

a. One tail (upper) test, z_p = 2.15, and σ = 0.10

b. One tail (lower) test, z_p = 0.66, and σ = 0.05

c. Two tail test, z_p = 1.69, and σ = 0.05

d. Two tail test, z_p = 1.44, and σ = 0.02