Three investments are provided as follow: Investment X: Risky asset; 20% return, 30% volatility Investment Y: Risky asset; 15% return, 25\% volatility Investment Z: Risk-free asset; 8% return Using the formula U=E(r)(1/2)A unless otherwise stated. Answer question 1 and 2 according to the above information. 1. Consider the investment separately, i.e. the investor can only choose one investment from three of the above. (a) (3 points) What is the Sharpe ratios for all investment given above? (b) (3 points) For an investor with A=1, which investment would he choose from? (c) ( 3 points) For an investor with A=5, which investment would he choose from