Compute the Sharpe ratio of the AlphaFund mutual fund using the following information: AlphaFund expected return = 7%, expected market return = 9.5%, expected risk-free return = 1%, expected standard deviation of AlphaFund risk premium = 14.2%, predicted beta of AlphaFund - 1.28 O 0.047 0.423 0.055 O 0.493