Question Three a) Explain and critically assess the Capital Asset Pricing Model (CAPM) and one of its extensions, the Black CAPM, when all assets are risky. Draw all relevant diagrams, including that associated with the Black CAPM. (80%) b) You are given the following information: oj PjM Security A 25% 0.3 Security B 30% -0.1 Market Portfolio 10% 1.0 Where o, is the standard deviation of the rate of return for asset j = A and j = B, PjM is the correlation coefficient between the return on asset j and the return on the market portfolio. The mean rate of return on the market portfolio is 4% and the risk-free rate of return is 2%. i) Using the CAPM, calculate the SML. ii) Define the beta coefficient and calculate it for the two assets