11. The following matrix presents the results of a two-factor experiment with two-levels of factor A, two levels of factor B, and n = 10 subjects in each treatment condition. Each value in the matrix is the mean score for subjects in that treatment condition. Notice that one of the values for the mean is missing. Factor B B1 B2 Factor A A1 15, 6, 7, 5, 7, 6 3, 3, 2, 2, 5, 5 A2 10, 11, 10, 7, 8, 8 5, 6, 7, 7, 7,8 a. What value should be assigned to the missing mean so that the resulting data would show you no main effect of factor A? b. What value should be assigned to the missing mean so that the resulting data would show you no main effect of factor B? c. What value should be assigned to the missing mean so that the resulting data would show you no AxB interaction effect