EFFECTIVE RATE OF INTEREST Find the interest rates eamed on each of the following. Round each answer to two decimal places. a. You borrow $680 and promise to pay back $714 at the end of 1 year. b. You lend $680 and the borrower promises to pay you $714 at the end of 1 year c. You borrow $63,000 and promise to pay back $390,080 at the end of 10 years. d. You borrow $11,000 and promise to make payments of $3,359.50 at the end of each year for 5 years