Stock A has a standard deviation of $15\%$ per year and Stock B has a standard deviation of $8\%$ per year. The correlation between stock A and Stock B is $0\mathrm{.}40.$ You have a portfolio of these two stocks wherein Stock B has a portfolio weight of $40\%($leaving Stock A$\text{'}$s portfolio weight at $60\%).$ What is your portfolio variance? Feel free to use Excel to show your work & answer.