An investor plans to invest 75 percent of her funds in the common stock of GAmma Industries and 25 percent in Epsilon Company. The expected return on GAmma is 12 percent and the expected return on Epsilonis 16 percent. The Standard deviation of returns for Gamma is 8 percent and for Epsilon is 12 percent. The correlation between the returns for Gamma and Epsilon is +0.8. Determine the standard deviation of returns for this investor's portfolio?