Mean Variance CovirAJB) 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 Percentage in Stock A Portfolio Return Portfolio Variance Portfolio Standard Deviation 0% 9.00% 10.00% 31.62% 10% 9.20% 8.94% 29.90% 20% 9.40% 8. 16% 28.57% 30% 9.60% 9.66% 2?.68% 40% 9.80% 144% 2T.28% 50% 10.00% 9.50% 27.39% 60% 10.20% 9.84% 28.00% 90% 10.40% 8.46% 29.09% 80% 10.60% 9.36% 30.59%