Find the interest rates earned on each of the following. Round your answers to the nearest whole number. a. You borrow $740 and promise to pay back $777 at the end of 1 year. % b. You lend $740, and the borrower promises to pay you $777 at the end of 1 year. % c. You borrow $70,000 and promise to pay back $229,490 at the end of 8 years. % d. You borrow $8,000 and promise to make payments of $2,219.30 at the end of each year for 5 years. %