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.) Annual Returns on Stocks A and B Year Stock A Stock B Portfolio AB 2006 12.5 % 20.5 % % 2007 33.6 % -32.9 % % 2008 -14.2 % 42.9 % % 2009 24.3 % 17.7 % % 2010 16.4 % 29.1 % % Avg return % % % Std deviation % % %