Figure 6.34 gives the Excel Solver model for the maximum flow model of Example 6.4-2 (file so.lverEx6.4-2.xls). The general idea of the model is similar to that used with the shortest-route model, which was detaled folleing Example 6.3-6. The main differences are: (1) there are no flow equations for the start node 1 and node 5,and (2) the objective is to maximize the total outflow at start node 1 (F9) or,equivalently,the total inflow at terminal node 5 (G13). File solverEx6.4-2.xls uses G13 as the target cell. You are encouraged to execute the model with F9 as the target cell