Formulate the dual of the following problem max Z= X₁ + 2x₂ + X3 + 2x + s.t. 2x₁ + 2x₂ 3x₁ + x₂ x₂ x₂ " x2 + 5x3+ + 2x3 Xz XA X4 ≤8 8 (1) + 4x₁ = 12 (2) ≥ 18 (3) 0 X₁ Z ≤0

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