For each of the following situations, find the critical value(s) for z or t. a) Ho: p =0.8 vs. HA: p # 0.8 at a =0.05 b) Ho: p =0.6 vs. HA: p > 0.6 at a = 0.01 c) Ho: H = 30 vs. HA: H # 30 at a = 0.01; n = 38 d) Ho: p = 0.8 vs. HA: p > 0.8 at a = 0.05; n = 345 e) Ho: H =60 vs. HA: p