eBook ind the interest rates earned on each of the following. Round your answers to the nearest whole number. . You borrow $680 and promise to pay back $748 at the end of 1 year. % . You lend $680 and the borrower promises to pay you $748 at the end of 1 year. % C. You borrow $64,000 and promise to pay back $492,716 at the end of 13 years. % d. You borrow $15,000 and promise to make payments of $4,058.60 at the end of each year for 5 years. %