4. Suppose you have an investment horizon of 10 years and bought a 20-year maturity, 8% coupon bond at par ($1,000) that pays coupons semiannually and is callable at a call price of $1,050. Assume the yield remains constant at 8% for three years after you buy the bond. At the end of year 3, suppose the yield drops to 5% and the issuer calls the bond. Assume you reinvest your funds in a new seven-year bond paying 5% coupons which are paid semiannually, and the yield remains at 5% for seven years. What is your total return until the call date?