6.9- The Desreumaux Company has two bonds outstanding. Both bonds pay $100 annual interest plus $1,000 at maturity. Bond L matures in 15 years, whereas Bond S matures in one year. One interest payment remains on Bond S. What will be the values of these bonds when the going rate of interest is (a) 5 percent and (b) 7 percent?

6.11- Severn Company's bond has four years remaining to maturity. Interest is paid semiannually, the bonds have a $1,000 par value, and the coupon interest rate is 9 percent. Compute the yield to maturity for the bonds if the current market price is (a) $851 and (b)$1,105.