2. Given this LP model: Objective function: Minimize 3x₁ 4x₂ Constraints: 6x₁ x₂ ≥ 120 4x₁ 4x₂ ≥ 320 3x₁ 5x₂ ≥ 300 x₁, x₂ ≥ 0 a. Graph the model. b. Find the optimal point on the graph using the objective function method. c. Use simultaneous equations to determine the optimal values of x₁ and x₂. d. Determine the amount of slack for each constraint.