An insurance company is analyzing the following three bonds, each with five years to maturity, annual coupon payments, and duration as the measure of interest rate risk. What is the duration of each of the three bonds? (Do not round intermediate calculations. Round your answers to 2 decimal places. (e.g., 32.16))

a. $10,000 par value, coupon rate = 8.1%, rb = 0.11

b. $10,000 par value, coupon rate = 10.1%, rb = 0.11

c. $10,000 par value, coupon rate = 12.1%, rb = 0.11

Please be as detailed as possible becasue i went through previous posts of this question and i still don't understand it. Also, if there is a way to complete this using the financial calculator please post that version instead. Thanks in advance!