Annual and Average Returns for Stocks, Bonds, and T-Bills, 1950 to 2017 You have a portfolio with an asset allocation of 39 percent stocks, 40 percent long-term Treasury bonds, and 21 percent T-bills. Use these weights and the returns given in the above table to compute the return of the portfolio in the year 2010 and each year since. Then compute the average annual return and standard deviation of the portfolio. (Do not round intermediate calculations. Round your answers to 2 decimal places.)