3. Use graphical method to solve the following linear programming problem and identify the nature of the solution (unique optimal solution, infinitely many optimal solutions, unbounded solution, or infeasible solution). (1) max 2 = s.t. 2x1 + 3x2 x1 + 2x2 ≤ 8 x1 + x₂ ≥ 1 x2 ≤4 x1, x2 > 0

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