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. (Click on the following icon e in order to copy its contents into a spreadsheet.) Year 2008 2009 2010 2011 2012 2013 Realized Returns Stock A Stock B - 6% 15% 7% 21% 7% 9% -5% -9% 2% - 10% 11% 17% The standard deviation of the portfolio is %. (Round to two decimal places.)