3 marks The following dictionary is obtained from solving a standard form LP problem with the simplex method. Find the next dictionary in the simplex method. Z = 7 -21 +2x4 2 = 12 +x1 3 5 +21 -04 = 4 +x1 - T4 To get credits for this problem, you should use Anstee's rule: . Choose the entering variable with the largest positive coefficient. . If there is a tie, then choose the one with the smaller subscript. . If there is a choice of leaving variable, then choose the one with the smallest subscript. For more discussion on Anstee's rule and related examples, see the self-study parts of the lecture notes of Lec9 for MWF class, Lec 6 for TuThu class