1. Willa of African by Dezign found in 2020, that 5.4%of the credit card accounts in the United States had outstanding balances that were 30 days or more overdue, whereas the corresponding percentage of Canadian credit card accounts was 2.6%. Assume that these estimates are based on random samples of 1004 U.S. credit card accounts and 935 Canadian credit card accounts. a. What is the pointIestimate for the difference between the population proportions? (2pts.) b. Construct a 99% confidence interval for the difference between the two population proportions. (4pts.) c. Test at the 2% level of significance whether the two population proportions are different. (6pts.)