trying to find the equations to solve the highlighted 3 subjects. below i have attached the excel sheet

A6 X V fx Use the statistics from the above table to calculate portfolio returns, portfolio variance, and portfolio standard deviation for each investment allocation from Cell A8 to A18 A B C D E F G H J K M N O P Q Stock A Stock B 2 Mean 0.11 0.09 3 Variance 0.12 .10 Cov(rA, rB) 0.04 UT Use the statistics from the above table to calculate portfolio returns, portfolio variance, and portfolio Percentage in Stock A Portfolio Return Portfolio Variance Portfolio Standard Deviation 0% 9 10% 10 20% 11 30% 12 40% 13 50% 14 60% 15 70% 16 80% 17 90% 18 100% 19 20 21 22