For each of the following situations, find the critical value(s) for z or t.

a) Ho: p = 0.7 vs. HA: p #0.7 at a = 0.01 b) Ho: p = 0.3 vs. HA: P > 0.3 at a = 0.01 c) Ho: H = 40 vs. HA: H # 40 at a = 0.01; n= 27 d) Ho: p = 0.7 vs. HA: p > 0.7 at a = 0.05; n = 335 e) Ho: H = 80 vs. HA: H