5FORMALIZE THE PROBLEM AND SOLVE WITH MATLAB. COPY AND PASTE THE COMMANDS YOU USED.

Consider 3 risky assets, 1,2,3, having respectively the following expected returns: 6%, 3%, 1%. The portfolio risk depending on the fraction invested in each risky asset is given by R=0.5x₁²-x₂x₃+0.9x₂. The investor wants to reach a portfolio return equal at least to 5% and in the market it is not possible to borrow. Determine by using MatLab the fraction to be invested in each risky asset in order minimize the expected portfolio risk.