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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)Ho:u< line underneath 83 and Ha:u>83 a=0.01
Right-tail tes with z = z = 2.3263
B)Ho:u> line underneath 92 and Ha:u<92 a=0.05
Left-tail test with z = -1.645
C)Ho:u=53 and Ha:u # 53 a=0.10
2-tail test with z = +/-1.645