please provide the steps and explanations

thank you so much

information about Three investments as below Probability 0.1 Investment A 300 0.2 350 Years 1 2 3 4 5 Nm Investment B 850 560 450 680 700 Investment C 500 600 700 800 900 0.35 0.2 0.15 280 460 500 If the investor wants to invest in any two of the above investments equally, which combination of two investments you select based on the portfolio risk