D 5.3-3. Consider the following problem. Maximize Z =6*1 + X2 + 2x3, subject to 2x1 + 2x2 + 713 -2 1 -4x1 - 2x2 7*3 =3 1 X1 + 2x2 + 7X3 -1 and x1 20, X2 2 0, X3 2 0. Let x4, X5, and x6 denote the slack variables for the respective con- straints. After you apply the simplex method, a portion of the final simplex tableau is as follows: Coefficient of: Basic Right Variable Eq. Z X1 X2 X3 X4 X5 X6 Side Z (0) 1 2 0 2 X5 X3 oo - OOO - N - X1