perform the problem by the GAMS program

A cargo plane has three compartments, the first has a capacity of 10 tons and 40m^3, the second has a capacity of 5 tons and 20 m^3, and the third has a capacity of 8 tons and 32 m^3. The aircraft's cargo consists of products: beans, corn, oats, and wheat. The cargo orders are: Product Order (ton) Volume (m3/ton) Beans Corn Oats Wheat 10 8 4 6 2 1.5 1.5 2 Utility or Profit ($/kg) 0.3 0.25 0.35 0.2 Due to market restrictions, it is necessary to fill at least 15% of the corn order, 20% of the wheat order, 10% of the oat order, and 25% of the bean order. In addition, to level the weight of the aircraft it is necessary that the 3 compartments have the same percentage of their occupied capacity by weight