Effective Rate of Interest Find the interest rate (or rates of return) in each of the following situations. Do not round intermediate calculations. Round your answers to the nearest whole number. a. You borrow $660 and promise to pay back $726 at the end of 1 year. % b. You lend $660 and receive a promise to be paid $726 at the end of 1 year. % c. You borrow $95,000 and promise to pay back $271,047 at the end of 11 years. % d. You borrow $10,000 and promise to make payments of $2,504.60 at the end of each of the next 5 years. %