Required: What must be the beta of a portfolio with E(xP)=15.908, if xf=6t and E(xM)=128 ? (Round your answer to 2 decimal places.) Suppose there are two independent economic factors, M1 and M2. The risk-free rate is 6%, and all stocks have independent firmspecific components with a standard deviation of 50%. Portfolios A and B are both well diversified. Required: What is the expected return-beta relationship in this economy? (Do not round intermediate calculations. Round your answers to decimal places.)