4 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 23% per year. Assume these values are representative of investors' expectations for future performance and that the current T-bill rate is 6% Calculate the utility levels of each portfolio for an investor with A = 3. Assume the utility function is u = (n) - 0.5 x Ao? (Negative amounts should be indicated by a minus sign. Do not round intermediate calculations. Round your answers to 4 decimal places.) 1111 points UIA-3) Skoped WBills 00 02 Windex 10 08 06 04 06 0.4 08 10 02 00 Reference