Effective rate of interestfind the interest rates earned on each of the following. round each answer to two decimal places. 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 $82,000 and promise to pay back $293,821 at the end of 7 years.%you borrow $20,000 and promise to make payments of $6,687.60 at the end of each year for 5 years.%