You want to earn an expected return of 15%. To achieve this goal, you can either invest in the stock of Gabl. Alternatively, you can form a portfolio that consists of the risk-free asset (long or short) and the market portfolio. The three assets have the following characteristics: - Risk-free asset: Expected rate of return of 3\% - Market portfolio: Expected return of 10% with standard deviation 15% - The stock of Gabl : Expected return of 15% with standard deviation 30%. What should you do to achieve a 15% return with minimum risk