Question: Determine the critical region and critical values for z that would be used to test the null hypothesis at the given level of significance, as described in each of the following:

a. H₀: \(\mu \) = 25 and Ha: \(\mu \ne \) 25, \(\alpha \) = 0.10
b. H₀: \(\mu \le \) 32 and Ha: \(\mu \) > 32, \(\alpha \) = 0.01
c. H₀: \(\mu \ge \) 13 and Ha: \(\mu <\) 13, \(\alpha \) = 0.05