Problem 2 Use the simplex method to solve: Maximize: Z= x₁ + 2x₂ + 3x3+4x4 Subject to: x₁ + 2x₂ + 2x3 + 3x4 ≤20 2x₁ + x₂+ 3x3+ 2x4≤20 X₁, X2 X3, X420 Is the optimal solution unique? Why or why not?

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