Question: ******Please solve it clearly, and show all steps. Please do not copy other users' answers. I'm posting them again because they're not clear.****** 4. Consider

******Please solve it clearly, and show all steps. Please do not copy other users' answers. I'm posting them again because they're not clear.******

******Please solve it clearly, and show all

4. Consider the integer programming model below. MaxZ=x1+x2S.t.3x1+2x28x225x1,x20x1,x2integer Use branch and bound method to solve the problem as described in part a,b,c,d below a. State your Subproblem 1 and solve it graphically. (6 P) b. State your Subproblem 2 and solve it graphically. (6 P) c. State your Subproblem 3 and solve it graphically. (6 P) d. Did you find an optimal solution at your current stage? (6 P) If yes state your optimal solution, x=(x1,x2) and Z. If no, state your lower and upper bound for Z

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