Consider historical data showing that the average annual rate of return on the S&P 500 portfolio over the past 85 years has averaged roughly 8% more than the Treasury bill return and that the S&P 500 standard deviation has been about 38% per year. Assume these values are representative of investors' expectations for future performance and that the current T-bill rate is 5%. Calculate the utility levels of each portfolio for an investor with A-2. Assume the utility function is u E(r) 0.5 Ag. (Do not round intermediate calculations. Round your answers to 4 decimal places. Negative amounts should be indicated by a minus sign. WBills WIndex U(A = 2) 0.0 1.0 0.1339 X 0.2 0.8 0.1140 X 0.4 0.6 0.0980 0.6 0.4 0.0820 x 0.8 0.2 0.0660 X 1.0 0.0 0.0500