Explain and show all your work for each part. On September 1, 2012, Al buys a bond for $15,000 that makes coupon payments of $750 after each of the following three years and returns its principal of $15,000 at the end of the three years. In other words, it is a standard coupon bond with a 5 percent annual interest rate making payments once each year On September 1, 2013, Al receives his first coupon payment of $750. At that time, the market interest rate on bonds like Al's has risen to 6 percent. Al sells his bond to Biff at that time, for a price equal to the present value of the bond's payments.