Using the data in the following table, and the fact that the correlation of A and B is 0.46, calculate the volatility (standard deviation) of a portfolio that is 70% invested in stock A and 30% invested in stock B. Realized Returns Year Stock A Stock B 2008 - 4% 30% 2009 16% 35% 2010 9% 10% 2011 -9% - 5% 2012 3% - 11% 2013 7% 18% The standard deviation of the portfolio is %. (Round to two decimal places.)