Brody took out a $12000 loan to pay for a car. The loan agreement stated, Brooke would have to pay to 16000 back in 36 months. a) What is the interest rate per annum on the loan if the interest is compounded quarterly? b) What is the interest rate per annum on the loan if the interest is compounded annually? c) Compare your results from part a) and part b) and explain why the results appear reasonable.