21. The average returns, standard deviations, and betas for three funds are given below along with data for the S&P 500 Index. The risk-free return during the sample period is 6%. Fund Avg Std Dev Beta A 13.6% 40% 1.1 B 13.1% 25% 1.0 C 12.4% 30% 1.3 S&P 500 12.0% 15% 1.0 Show formulas, calculations and results with 2 decimals. (3 points) a. Which fund has the best performance using the Sharpe ratio? b. And using Treynor ratio? c. Which one generates the higher alpha? Which performance measure are you using to obtain the alphas?