Calculate the effective annual rate on each of the following loans:
a. A $ 5,000 loan for two years, 10 percent simple annual interest, with principal repayment at the end of the second year
b. A $ 5,000 loan for two years, 10 percent add on interest, paid in 24 equal monthly installments
c. A $ 5,000 loan to be repaid at the end of two years, 10 percent discount rate