Find the interest rate (or rates of return) for each of the following situations. Round your answers to two decimal places.

a) You borrow $700 and promise to pay back $742 at the end of 1 year.

%

b) You lend $700 and receive a promise to be paid $742 at the end of 1 year.

%

c) You borrow $90,000 and promise to pay back $197,905 at the end of 9 years.

%

d) You borrow $10,000 and promise to make payments of $2,445.7 at the end of each year for 5 years.

%