Question: Question 3 (16 points) Consider the following network problem. -9 5 () 5 The numbers on the arcs represent the shipment cost between nodes. 1.

Question 3 (16 points) Consider the following network problem. -9 5 () 5 The numbers on the arcs represent the shipment cost between nodes. 1. Which nodes are supply nodes? (2 points) 2. How much supply can the source nodes provide? (2 point) 3. Which nodes are demand nodes? (2 points) 4. How much demand exists in the demand node? (2 point) 5. Model this network problem; define decision variables, objective function and constraints clearly. (8 points)

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