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 $756 at the end of 1 year. % b. You lend $720, and the borrower promises to pay you $756 at the end of 1 year. % c. You borrow $60,000 and promise to pay back $166,385 at the end of 9 years. % d. You borrow $14,000 and promise to make payments of $3,693.20 at the end of each year for 5 years. %