Using semiannual compounding, find the prices of the following bonds: a. A 9.9%, 15-year bond priced to yield 7.8% b. A 6.6%, 10-year bond priced to yield 8.7% C. A 11.9%, 20-year bond priced at 9.8%. Repeat the problem using annual compounding. Then comment on the differences you found in the prices of the bonds. a1. Using semiannual compounding, the price of the bond is $ (Round to the nearest cent.) b1. Using semiannual compounding, the price of the bond is (Round to the nearest cent.) c1. Using semiannual compounding, the price of the bond is $ (Round to the nearest cent.) a2. Using annual compounding, the price of the bond is $ (Round to the nearest cent.) b2. Using annual compounding, the price of the bond is $ (Round to the nearest cent.) c2. Using annual compounding, the price of the bond is $ (Round to the nearest cent.)