You own a stock portfolio invested 35 percent in Stock Q, 25 percent in Stock R, 25 percent in Stock S, and 15 percent in Stock T. The betas for these four stocks are .83, 1.21, 1.22, and 1.39, respectively. What is the portfolio beta? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) Portfolio beta A stock has an expected return of 12.4 percent, the risk-free rate is 4.5 percent, and the market risk premium is 10 percent. What must the beta of this stock be? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) Beta of stock