Find the interest rates in the following situations. a. APR =8%, compounded monthly. Find the effective annual interest rate. b. Nominal rate is 7% compounded quarterly. Find the effective semi-annual rate. c. The effective annual interest rate is 13.36% and compounding is monthly. Find the nominal interest rate. d. /=4% and compounding is monthly. Find the effective quarterly interest rate. a. The effective annual interest rate is %. (Round to one decimal place.)