Consider historical data showing that the average annual rate of return on the S\&P 500 portfolio over the past 85 years has averaged roughty 8% more than the Treasury bitl return and that the S\&P 500 standard deviation has been about 28% 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 irvestor with A=2. Assume the utility function is. U=E(r).5. A 2. (Do not round intermediate calculations. Round your answers to 4 declmal places. Negative amounts should be indicated by a minus sign.)