Effective rate of interest

Find the interest rates earned on each of the following. Round each answer to two decimal places.

1. You borrow $750 and promise to pay back $795 at the end of 1 year.

2. You lend $750 and the borrower promises to pay you $795 at the end of 1 year.

3. You borrow $58,000 and promise to pay back $251,403 at the end of 12 years.

4. You borrow $9,000 and promise to make payments of $2,684.80 at the end of each year for 5 years.