29-32: Credit Card Debt. Suppose that on January 1 you have a balance of $10,000 on each of the following credit cards, which you want to pay off in the given amount of time. Assume that you make no additional charges on the card after January 1. a. Calculate your monthly payments. b. When the card is paid off, how much will you have paid since January 1? c. What percentage of the total payment found in part (b) is for interest? 29. The credit card APR is 18%, and you want to pay off the balance in 1 year. 30. The credit card APR is 20%, and you want to pay off the bal- ance in 2 years. 31. The credit card APR is 21%, and you want to pay off the balance in 3 years. 32. The credit card APR is 22%, and you want to pay off the balance in 1 vear