Recently, you made multepe large parchases on your credit card totaing s17,600. The interest rate on your credt cand is 15.3% per year, compounded monthil, and your statement says your minimum payment is $280 per month. (a) How mony minimum payments wal you need to make in order to pay off your purchases, assuming you cut vo your eredit card and do not make any addtional purchases? (Round your answer 4o to the nearest number or payments.) You will need minimam pyrments. (b) How much wotal interest (in dollars) wa you noy by making the minimum monthil payment? (Round your answer to the nearest doilar.)