2) An investor's risk preferences are characterized by the following utility function: U-E(r)-0,5AO? Besides the stock A and B, now the investor can also invest in newly issued T-bills with annual rate of return at 5%. With risk-aversion level at A-4, the investor is considering holding a portfolio of both stocks (A and B) and the T-bills. Will the investor be better off or worse off by doing this compared to holding the minimum variance portfolio)? Why or why not. If so, how much the investor will have to invest in stock A, B and the T-bills respectively if the investor has $10000? 2) An investor's risk preferences are characterized by the following utility function: U-E(r)-0,5AO? Besides the stock A and B, now the investor can also invest in newly issued T-bills with annual rate of return at 5%. With risk-aversion level at A-4, the investor is considering holding a portfolio of both stocks (A and B) and the T-bills. Will the investor be better off or worse off by doing this compared to holding the minimum variance portfolio)? Why or why not. If so, how much the investor will have to invest in stock A, B and the T-bills respectively if the investor has $10000