Find the interest rates earned on each of the following. Round your answers to the nearest whole number. a. You borrow $700 and promise to pay back $742 at the end of 1 year. % b. You lend $700 and the borrower promises to pay you $742 at the end of 1 year. % c. You borrow $81,000 and promise to pay back $161,920 at the end of 9 years. % d. You borrow $15,000 and promise to make payments of $4,053.60 at the end of each year for 5 years. %