You receive the following time series returns on three shares with which you wish to build a 2-share portfolio: Yr. Rio BHP Wes 1 3% 5% -2.5% 2 shares. -5% -1% 1.5% 3 -2% -8% 4.25% The portfolio with the lowest risk is 4 7% 3% 3.5% due in large part to a 5 10% 6% 3% 6 8% 12% 2.5% Construct all possible share combinations of the 2-share portfolio. The possible weights are 60% and 40% split between the shares. 7 13% 10% 3% at variance of 8 14% 11% 2.75% correlation between the portfolio