39. An insurance company is analyzing the following three bonds, each with 6 years to maturity, and is using duration as its measure of interest risk

1. $10,000 par value, coupon rate = 8%, rb= 0.10

2. $10,000 par value, coupon rate = 10%, rb= 0.10

3. $10,000 par value, coupon rate = 12%, rb= 0.10