impus Common Stock C has a standard deviation of return of 10 percent. Common Stock D has a standard deviation of return of 20 percent. The correlation coefficient between the two stocks is 0.5. If you invest 60 percent of your funds in stock C and 40 percent in Common stock D, what is the standard deviation of your portfolio? 12.2 percent 10.3 percent 21.0 percent 14.8 percent