What is the standard deviation of a random variable q with the following probability distribution? (Do not round intermediate calculations. Enter your answer in numbers not in percentage. Round your answer to 4 decimal places.) Value of a Probability 0.20 0.27 0.53 1 2 Standard deviation 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%. Calculate the utility levels of each portfolio for an investor with A= 2. Assume the utility function is U = E(r) - 0.5 x A02. (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 0.2 0.8 0.4 0.6 0.6 0.4 0.8 0.2