You are considering an investment in either individual stocks or a portfolio of stocks. The two stocks you are researching, Stock A and Stock B, have the following historical returns: Year 2015 -24.00 % -7.00 % 2016 43.00 15.00 2017 29.00 -11.00 2018 -3.00 51.00 2019 21.00 18.00.

1. Calculate the standard deviation of returns for each stock and for the portfolio. Do not round intermediate calculations. Round your answers to two decimal places.