22. Suppose the market portfolio is equally likely to increase by 30% or decrease by 10%. a. Calculate the beta of a firm that goes up on average by 43% when the market goes up and goes down by 17% when the market goes down. b. Calculate the beta of a firm that goes up on average by 18% when the market goes down and goes down by 22% when the market goes up. c. Calculate the beta of a firm that is expected to go up by 4% independently of the market. a and the Cost of Capital 23. Suppose the risk-free interest rate is 4%. a. i. Use the beta you calculated for the stock in Problem 22 (a) to estimate its expected return. ii. How does this compare with the stock's actual expected return? b. i. Use the beta you calculated for the stock in Problem 22(b)c ii. How does this compare with the stock's actual