PLEASE show your work

(Bond valuation) You are examining three bonds with a par value of $1,000 (you receive $1,000 at maturity) and are concerned with what would happen to their market value if interest rates (or the market discount rate) changed. The three bonds are Bond A-a bond with 5 years left to maturity that has an annual coupon interest rate of 8 percent, but the interest is paid semiannually. Bond B-a bond with 11 years left to maturity that has an annual coupon interest rate of 8 percent, but the interest is paid semiannually. Bond C-a bond with 19 years left to maturity that has an annual coupon interest rate of 8 percent, but the interest is paid semiannually. What would be the value of these bonds if the market discount rate were a. 8 percent per year compounded semiannually? b. 4 percent per year compounded semiannually? c. 17 percent per year compounded semiannually? d. What observations can you make about these results