3. Suppose that the risk-free interest rate is 0.023, that the expected return on the market portfolio is M-0.10, and that the volatility of the market portfolio is M-0.12. (a) What is the expected return on an efficient portfolio with R-0.05? (b) Stock A returns have a covariance of 0.004 with market returns. What (c) Stock B has beta equal to 1.5 and 0.08. Stock C has beta equal i. What is the expected return of a portfolio that is one-half Stock B ii. What is the volatility of a portfolio that is one-half Stock B and is the beta of Stock A? to 1.8 and ' = 0.10 and one-half Stock C? one-half Stock C? Assume that the es of Stocks B and C are in dependent