a. What is a convertible bond? Is a convertible bond more or less attractive to a bondholder than a nonconvertible bond? b. What is a callable bond? Is a call provision more or less attractive to a bond holder than a non-callable bond? c. Explain the meaning of a sinking fund provision on a bond issue. d. What is the difference between an investment grade bond and a junk bond? e. What happens to the fair present value of a bond when the required rate of return on the bond increases? f. All else equal, which bond's price is more affected by a change in interest rates, a short-term bond or a longer-term bond? Why? g. How do bond ratings and interest rate spreads on bonds differ? Which measure is considered by many investors to be a more comprehensive measure of risk? Why