Effective rate of interest

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

1. a.Youborrow$700andpromisetopayback$756attheendof1year.
2. b.Youlend$700andtheborrowerpromisestopayyou$756attheendof1year.
3. c.Youborrow$99,000andpromisetopayback$798,360attheendof12years.
4. d. You borrow $18,000 and promise to make payments of $4,390.00 at the end of each year for 5 years.