Stocks A and B have the following historical returns: Year Stock A's Returns 2015 (24.25%) 2016 18.50 2017 38.67 2018 14.33 2019 39.13 Stock B's Returns 5.50% 26.73 48.25 (4.50) 43.86 Assume the risk-free rate during this time was 3.5%. What are the Sharpe ratios for Stocks A and B and the portfolio over this time period using their average returns? Answers: a) Sharpe ratio for Stock A b) Sharpe ratio for Stock B c) Sharpe ratio for Portfolio AB = Note: enter your answers with 4 decimal places