21. Morin Company's bonds mature in 8 years, have a par value of $1,000, and make an annual coupon interest payment of $85. The market requires an interest rate of 8.0% on these bonds. What is the bond's price? 22. Polyscientific Corporation's bonds make an annual coupon payment of 8.5%. The bonds have a par value of $1,000, a current price of $1,255, and mature in 15 years. What is the yield to maturity on these bonds? 23. Jim Angel holds a $200,000 portfolio consisting of the following stocks: Stock A B C D Total Investment (S) 30,000 60,000 30,000 80,000 $200,000 Beta 0.95 1.00 1.40 1.30 (a) What is the portfolio's beta? (Hint: take a weighted average.) (b) If the market return is 11% and the risk free rate is 4%; what is the portfolio's required rate of return