Ilona Franc manages TREF, a retirement equity fund for teachers. She works with others to decide how to invest retirement moneys contributed by Universities to employees' retirement accounts. In Ilona's case, teachers have indicated they want their money to be invested in stocks. Ilona is looking at global stocks that have not been included in the TREF portfolios to this point. She has the return history of the 4 stocks for the last 24 months and has entered them into an Excel workbook (hw3.xlsx) in a worksheet called, "TREF." Ilona wants to look at the possibility of combining the stocks into a portfolio. She decides to investigate the case where she puts 50% of the money into Stock A, 30% into Stock B, and 10% each into stocks C and D. What is the estimated expected (mean) return of such a portfolio? Enter your answer as a decimal (fraction) rather than a percentage. Now find the estimated standard deviation of the portfolio. As before, enter your answer as a decimal to 4 decimal places.