Fill in the missing information in the following table. Assume that Portfolio AB is 40 percent invested in Stock A. (A negative value should be indicated by a minus sign. Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places.) Annual Returns on Stocks A and B Year Stock A Stock B Portfolio AB 2015 13.0 % 21.0 % % 2016 33.8 % -33.2 % % 2017 -14.6 % 43.2 % % 2018 24.4 % 17.6 % % 2019 16.2 % 28.8 % % Average return % % % Standard deviation % % %