Using semiannual compounding, find the prices of the following bonds: a. A 8.7%,15-year bond priced to yield 6.3%. b. A 6.1%,10-year bond priced to yield 8.5%. c. A 12%,20-year bond priced at 9.6%. 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.)