A) We want to test if ABC bank's default rate is significantly less than 8%. Out of a random sample of 300 customers, 22 customers defaulted. Construct HO and Ha, and test it with a significant level 5%. B) We want to test if the approval rate of school tax bill is significantly more than 60%. 1290 out of 2000 randomly selected voters support the bill. Construct HO and Ha, and test it with a significant level 5%. C) Calculate the p-value of the test statistic in Exercise A. Is the p-value consistent with the test result? Also test HO again with a = 0.01 and a = 0.001. D) Calculate the p-value of the test statistic in Exercise B. Is the p-value consistent with the test result? Also test HO again with a = 0.01 and a = 0.001.