2. Returns on stocks X and Y are listed below: Period 1 2 3 4 5 6 7 Stock X 7% 1% -2% -3% 5% 11% 5% Stock Y -4% 10% 4% 8% 7% 1% -3% Consider a portfolio of 10% stock X and 90% stock Y. What is the mean of portfolio returns? Please specify your answer in decimal terms and round your answer to the nearest thousandth (e.g., enter 12.3 percent as 0.123)