Suppose you lend $21,000 to a friend at an APR of 9.10%. Your friend will pay you back beginning next month with 36 monthly installments. You can reinvest the payments you receiv in your money market account at an APR of 3.70%, calculated monthly. a. How much will your friend pay you each month? b. How much will you have in your account at the end of 36 months? (to nearest $) c. What is your effective annual retum (EAR)._%