4. You have performed the Markowitz optimization on a portfolio with 3 assets whose risk/return characteristics are summarized in the table below: Asset 1 Asset 2 Asset 3 5.00% 10.00% 15.00% E[r] s.d. 10.00% 15.00% 20.00% The 'bordered matrix' for the optimal risky portfolio based on these three assets is given below: Bordered matrix W1 W2 W3 -1.522 1.585 0.938 W1 -1.522 0.0232 -0.0261 -0.0044 W2 1.585 -0.0261 0.0565 -0.0033 W3 0.938 -0.0044 -0.0033 0.0352 Please, find the optimal risky portfolio's variance, standard deviation, and expected return. If the portfolio's Sharpe ratio is 0.8902, find the risk-free rate. Express all interest rates as percentages with 3 digits after the decimal point