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Please give me the solutions to this problem:

Introduction to Management Science (12th Edition) - chapter 4 - problem 66p.

The National Cereal Company produces a Light-Snak cereal package with a selection of small pouches of four different cereals: Crunchies, Toasties, Snakmix, and Granolies. Each cereal is produced at a different production facility and then shipped to three packaging facilities where the four different cereal pouches are combined into a single box. The boxes are then sent to one of three distribution centers where they are combined to fill customer orders and shipped. The following figure 1 shows the weekly flow of the product through the production, packaging, and distribution facilities (referred to as a "supply chain").

Production Packaging Distribution ingredients 2 50 14 3 60 50 40 7 10 12 14 16 60 4 46 8 19 12 50

Figure 1: The supply chain

Ingredients capacities (per 1,000 pouches) per week are shown along branches 1-2, 1-3, 1-4, and 1-5. For example, ingredients for 60,000 pouches are available at the production facility as shown on branch 1-2. The weekly production capacity at each plant (in 1,000s of pouches) 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 boxes (1,000s) 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 0.16 0.24 0.19 0.11 0.27 0.27 0.28 0.07 0.13 0.10

Weekly demand for the Light-Snak product is 37,000 boxes.
Wanted is a solution that indicates how much product is produced at each facility that will meet weekly demand at the minimum cost.
 Formulate a linear programming model for this problem.
 Solve the model using the computer. Document the implementation by screenshots, a file won’t be read.
 Interpretate the results.

Please help. Thank in advance.

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