You are considering two stocks with the following characteristics: Expected return of stock 1(1)=0.15, Expected return of stock 2(2)=0.07, Standard deviation of stock 1 's returns (1)=0.09, Standard deviation of stock 2's returns (2)=0.02, and Covariance between the rates of returns of stock 1 and stock 2(21 or 21)=0.09. If you invest 0.47 percent of your total investment on stock 1 and 0.53 percent on stock 2 , what would be the standard deviation of the portfolio consisting of these two stocks