Suppose you owe $1,400 on your credit card. The annual percentage rate (APR) is 21%, compounded monthly. The credit card company says your minimum monthly payment is $28.28. a. If you make only this minimum payment, how long will it take for you to repay the $1,400 balance (assuming no more charges are made)? b. If you make the minimum payment plus $13.44 extra each month (for a total of $41.72), how long will it take to repay the $1,400 balance? c. Compare the total interest paid in Part (a) with the total interest paid in Part (b).