a) One year ago, Alpha Supply issued 15-year bonds at par. The bonds have a coupon rate of 6.5 percent and pay interest annually. Today, the market rate of interest on these bonds is 7.2 percent. How does the price of these bonds today compare to the issue price? (10 marks) b) A bond has a yield to maturity of 9.38 percent, a 7.5 percent annual coupon, a $1,000 face value, and a maturity date 21 years from today. What is the current yield? c) Describe factors affecting bond's grade. (10 marks) (10 marks)