Can someone help me please..

6. Problem 5.12 (Effective Rate of Interest) 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 $767 at the end of 1 year. % b. You lend $650, and the borrower promises to pay you $767 at the end of 1 year. % c. You borrow $70,000 and promise to pay back $308,801 at the end of 10 years. % d. You borrow $16,000 and promise to make payments of $5,001.00 at the end of each year for 5 years. %