please show me the correct steps to arrive at the correct answer shown!

Correct! ect Answer Use the information below to calculate the standard deviation of your portfolio to 1 decimal in percent form. Note 12.31% standard deviation should be entered as "12.3" Stock 1 Weights 20% The rest if it Expected Return 3% 12% Standard Dev. 6.% 22 % Correlation between stocks1 and 2 0.2 17.81 Stock 2 17.88 margin of error +/-0.5 Great job