Find the interest rates earned on each of the following. Round your answers to the nearest whole number. 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 $63,000 and promise to pay back $567,470 at the end of 14 years. % d. You borrow $9,000 and promise to make payments of $2,684.80 at the end of each year for 5 years. %