eBook 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. 5% b. You lend $720 and the borrower promises to pay you $756 at the end of 1 year. 5 % c. You borrow $78,000 and promise to pay back $215,205 at the end of 15 years. % d. You borrow $11,000 and promise to make payments of $3,359.50 at the end of each year for 5 years. %