Joanna uses her credit card to finance a $500 purchase. Her card charges an annual nterest rate of 21.75%, compounded monthly, and assumes a 15-yr term. Assume that Joanna makes no further purchases on her credit card. a Find Joanna's monthly credit card payment. b) Assume that Joanna makes every payment for the life of the loan. Find her total payments c) How much interest does Joanna pay? What is the correct formula for this situation? ct a) Joanna's monthly credit card payment is (Simplify your answer. Do not round until the final answer. Then round to two decimal places as needed. Do not include the S symbol in your answer.) b) The total of Joanna's payments is S (Simplify your answer. Do not round until the final answer. Then round to two decimal places as needed. Do not include the S symbol in your answer.) c) Joanna pays S nterest (Simplify your answer. Do not round until the final answer. Then round to two decimal places as needed. Do not include the S symbol in your answer.)