An investor constructs the following portfolio: X (35%) Kisky (60%) Y (30%) Overall portfolio Z 1?) Risk-free (40%) T-Bills (100%) Note that the percentages between parentheses represent the weights. Assume that the cxpected return and risk on the overall portfolio are respectively equal to 14% and 22%. The risk-free rate is 7%. 1. Determine the proportion that this investor has invested in asset Zin the overall portfolio (risky and risk-free assets).* a. 15% b.9% c. 1893 d. 49% e. None of the above 2. Assume that the investor's degree of risk aversion is A=2. What proportion. y. of the total investment should be invested in the risky assets?* a. 21.69% O b. 15.91% O O c.72.31% O d. 47.72% O e None of the above 3. What is the investor's risk on the optimized portfolio?* O a. 15.91% b. 3.5% O c.4.77% O d d. 10.5% Oe. None of the above