Fill in the missing information in the following table. Assume that Portfolio AB is 50 percent invested in Stock A. (Negative values should be indicated by a minus sign. Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places. Omit the "%" sign in your response.) Stock A Stock B Stock AB 2009 15.5 % 24.5 % % 2010 35.2 % –35.3 % % 2011 –17.4 % 45.3% % 2012 25.1 % 16.9 % % 2013 14.8 % 26.7 % % Average return % % % Standard deviation % % %