Problem 12-9 : Question Help Using the data in the following table, and the fact that the correlation of A and B is 0.54, calculate the volatility (standard deviation) of a portfolio that is 60% invested in stock A and 40% invested in stock B. Year 2008 2009 2010 2011 2012 2013 Realized Returns Stock A Stock B -9% 22% 17% 36% 15% -7% -2% 5% -3% 10% 27% 5% The standard deviation of the portfolio is 14.75%. (Round to two decimal places.)