Using the table below, calculate the portfolio standard deviation for a portfolio with 25% in security D and 75% in security A. Time B. % A, % 18.56 D. % 1 C.% 12.82 18.23 Mkt, % 12.28 12.43 2. 15.27 18.24 -5.82 13.45 5.99 3 14.12 14.71 4.32 4 -1.57 12.58 -7.43 -6.56 12.41 -4.48 -8.54 5 13.16 9.12 12.45 12.21 13.41 6 21.22 6.34 17.54 8.12 14.32 07.12% O 12.21% 9.43% 11.30%