Find the interest rates earned on each of the following. Round your answers to the nearest whole number.

You borrow $710 and promise to pay back $781 at the end of 1 year. %

You lend $710, and the borrower promises to pay you $781 at the end of 1 year. %

You borrow $50,000 and promise to pay back $85,910 at the end of 8 years. %

You borrow $16,000 and promise to make payments of $5,001.00 at the end of each year for 5 years. %