using the graphical method. Explain your approach and solution. d) Which constraints are active in the optimal solution? e) Suppose we add the constraint x1 + x2 >= a to LP. For which values of a: Is the constraint redundant? The optimal solution found above is no longer optimal? > The problem becomes infeasible? f) Replace the objective function with the objective function 3 x_{1}+\beta x_{2}, \text { and compute the values of } \beta \text { for which the point }(0,3 / 2) \text { is optimal }
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