Find the interest rates earned on each of the following. Round your answers to the nearest whole number. a. You borrow $650 and promise to pay back $780 at the end of 1 year. b. You lend $650 and the borrower promises to pay you $780 at the end of 1 year. % c. You borrow $55,000 and promise to pay back $73,706 at the end of 6 years. d. You borrow $18,000 and promise to make payments of $4,390.00 at the end of each year for 5 years