Simon recently received a credit card with an 18% nominal interest rate. With the card, he purchased an Apple iPhone 7 for $480.00. The minimum payment on the card is only $20 per month. a. If Simon makes the minimum monthly payment and makes no other charges, how many months will it be before he pays off the card? Do not intermediate calculations. Round your answer to the nearest month(s) b. If Simon makes monthly payments of $60, how many months will it be before he pays off the debt? Do not round intermediate calcurs answer to the nearest whole number. month(s) Round your answer to the nearest cent. $