Given the following information, use the approximation method to calculate the duration of the semiannual, option-free bond. (Use yield changes of 10 basis points to calculate P+ and P-, and carry price calculations to 3 digits) Coupon: 6%, Initial Yield 5%, Maturity: 10yrs, Initial Price=107.795 (per $100 par). Using the above information, calculate the approximate convexity measure of the bond.

1. 64.81

2. 72.35

3. 52.87

4. 84.56