ment 3 (Ch 6 and 7) 6 Saved Help Save & Exit Submit Check my work 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 37% per year. Assume these values are representative of investors' expectations for future performance and that the current T-bill rate is 5%. ook Calculate the utility levels of each portfolio for an investor with A = 2. Assume the utility function is U= 0 - 0.5 * Ao2. (Do not round intermediate calculations. Round your answers to 4 decimal places.) int rences WBills Windex U(A =2) 0.2 1.0