Assume the risk-free rate equals Rf=4%, and the return on the market portfolio has expectation E[RM]=12% and standard deviation M=15%. a. What is the equilibrium risk premium (that is, the excess return on the market portfolio)? b. If a certain stock has a realized return of 14%, what can we say about the beta of this stock? c. If a certain stock has an expected return of 14%, what can we say about the beta of this stock? d. What is the expected return for the security with beta of 0.6