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 expected return and variance of portfolios invested in T-bills and the S&P 500 index with weights as shown below. (Enter your answers as decimals rounded to 4 places. Leave no cells blank - be certain to enter "0" wherever required.)

WBills	WIndex	Expected Return	Variance
0.0	1.0	0.1300	0.1369	Example
0.2	0.8
0.4	0.6
0.6	0.4
0.8	0.2
1.0	0.0