Define the standard form model for this problem

A company produces 4 different modules which are then shipped to 3 packaging facilities to be assembled together into a single finished complex industrial product. Finished products are then shipped to three distribution centers which process customer orders. The following network diagram describes the overall supply chain Ingredients Production Packaging Distribution 2 50 6 14 12 60 3 50 40 1 55 7 10 12 14 60 16 4 46 8 11 19 5 12 50 Components capacities per week are shown along branches 1-2, 1-3, 1-4, and 15. For example, components for 60 modules are available at the production facility, as shown on branch 1-2. The weekly production capacity at each plant is shown at nodes 2, 3, 4, and 5. The packaging facilities at nodes 6, 7, and 8 and the distribution centers at nodes 9, 10, and 11 have capacities for finished products as shown. The various production, packaging, and distribution costs per unit at each facility are shown in the following table: Facility 2 3 4 5 6 7 8 9 10 11 Unit cost $17 20 18 16 26 29 27 12 11 14 Weekly demand for the finished product is 37 units