please answer both parts

B6-39 (book/static) A Question Help (Annuity payments) Calvin Johnson has a $5,000 debt balance on his Visa card that charges 12.9 percent APR compounded monthly. In 2009. Calvin's minimum monthly payment is 3 percent of his debt balance, which is $150. How many months (round up) will it take Calvin Johnson to pay off his credit card if he pays the current minimum payment of $150 at the end of each month? In 2010, as the result of a federal mandate, the minimum monthly payment on credit cards rose to 4 percent. If Calvin made monthly payments of $200 at the end of each month, how long would it take to pay off his credit card? a. If Calvin made monthly payments of $150 at the end of each month, how long would it take to pay off his credit card? months (Round up to the nearest unit.)