Assume the following information concerning a two-stock portfolio: Stock X Stock Y Percent of Portfolio 37% Please calculate it Average annual return 6.29% 5.13% Standard deviation of returns 5.7 14.4 Covariance of returns 19 Calculate the standard deviation of the portfolio using Markowitz formula. Round the answers to two decimal places. (Write the percentage sign in the "units" box). Please note that intermediate answers should be calculated to at least 5 decimals.