For Part D. How do I solve using AMPL (Amplide)

6-26 Paper can be made from new wood pulp, from recycled office paper, or from recycled newsprint. New pulp costs $100 per ton, recycled office paper, $50 per ton, and recycled newsprint, $20 per ton. One available process uses 3 tons of pulp to make 1 ton of paper; a second uses 1 ton of pulp and 4 tons of recycled office paper, a third uses 1 ton of pulp and 12 tons of recycled newsprint; a fourth uses 8 tons of recycled office paper. At the moment only 80 tons of pulp is available. We wish to produce 100 tons of new paper at minimum total cost. (a) Explain why this problem can be modeled as the LP min 100x1 + 50x2 + 2023 21 = 3y1 + y2 + y 22 = 4y2 + 8y4 23 = 12y 21