Basic bond valuation problems: (a) (5 points) Suppose that an investor has 6-year investment horizon. The investor is considering a 20-year semi-annual coupon bond selling at par and having a coupon rate of 9%. The investors expectations are as follows: The first 6 semi-annual coupon payments can be reinvested from the time of receipt to the end of the investment horizon at an annual interest rate of 8%; The next 6 semi-annual coupon payments can be reinvested from