Fill in the missing information in the following table. Assume that Portfolio AB is 50 percent invested in Stock A. (Round your answer to 2 decimal places. Negative amounts should be indicated by a minus sign. Omit the "%" sign in your response.) Year Annual Returns on Stocks A and B Stock A Stock B Portfolio AB 2006 2007 2008 2009 2010 Avg return Std deviation 15.5% 35.2% -17.4% 25.1% 14.8% 24.5% -35.3% 45.3% 16.9% 26.7% % % % % % % % % % % %