Can you please solve this ? it's urgent

Calculate the portfolio's standard deviation. 10 points Consider the following probability distribution for stocks A and B: State Probability Return on Stock A Return on Stock B 1 0.20 10% -8% 2 0.25 11% 10% 3 0.15 -12% -20% 0.30 --14% 1896 5 0.10 16% Calculate the portfolio's standard deviation of returns if WA -40% and W. 60%. 1 Add file