help with #2, #4 is the problem from set 3.4a that #2 is referring to.

sum of the artiticial variables in Phase I. 2. For each case in Problem 4, Set 3.4a, write the corresponding Phase I objective function. me 00)ecuve uncuon is to maximize z = 4x1 + x2 4. Consider the following set of constraints: 2x1 +312-3 (1) 4x5x2 10 (2) +2125 (3) 6x 7x2 3 (4) 4x 8x 5 (5) 20 For each of the following problems, develop the z-row after substituting out the artificial variables: (a) Maximizez x6x2 subject to (1), (3), and (4). (b) Maximize z 2x1 7x2 subject to (1), (2).(4), and (5). (e) Minimize 362 subject to (3).(4). and (S). (d) Minimize z = 4x1 + 6x2 subject to (1), (2), and (5). (e) Minimize z = 3x1 + 2x2 subject to (1) and