Consider an investor with preferences given by the utility function U = E(r) - 0.5A0- and there are two portfolios with the following characteristics: Portfolio A Portfolio B E(r) = 0.148 O=0.16 E(T) = 0.082 o= 0.068 (a) Suppose that the investor has a level of risk aversion of A = 4. Which portfolio should the investor choose? [3 Points] (6) Suppose that the investor has a level of risk aversion of A = 6. Which portfolio should the investor choose? [3 Points] (C) Suppose the investor has a level of risk aversion of A = 4 What must the return be on a risk-free asset in order for the investor to be indifferent between investing in the risk-free asset and Portfolio B? [3 Points] (d) Suppose the investor has a level of risk aversion of A = 4. Calculate the risk-premium associated with Portfolio B. Assume that the risk-free rate is the same as your answer in Part(c). [3 Points]