Using the data in the following table, and the fact that the correlation of A and B is 0.82, calculate the volatility (standard deviation) of a portfolio that is 80% invested in stock A and 20% invested in stock B Realized Returns Stock B 15% 30% 9% -10% Stock A Year 2008 2009 2010 2011 2012 2013 17% 8% -4% 196 15% 19% The standard deviation of the portfolio is (Round to two decimal places.)