5-12 EFFECTIVE RATE OF INTEREST Find the interest rates earned on each of the following: a. You borrow $720 and promise to pay back $792 at the end of 1 year. b. You lend $720 and the borrower promises to pay you $792 at the end of 1 year. c. You borrow $65,000 and promise to pay back $98,319 at the end of 14 years. d. You borrow $15,000 and promise to make payments of $4,058.60 at the end of each year for 5 years