6.S2. Assessing the Capacity of a Pipeline Network Exxo 76 is an oil company that operates the pipeline network shown below, where each pipeline is labeled with its maximum flow rate in million cubic feet (MMcf) per day. A new oil well has been constructed near A. They would like to transport oil from the well near A to their refinery at G. Formulate and solve a network optimization model to determine the maximum flow rate from A to G. A 20 20 B 2 15 8 D 12 23 6 15 E F 14 4 16 G 6.2.* Consider the transportation problem having the unit shipping costs shown in the following table. Source 1 2 Demand 1 6 5 30 Destination 2 7 8 40 3 4 6 30 Supply 40 60 a. Formulate a network model for this problem as a minimum-cost flow problem by drawing a network similar to Figure 6.3.