1. In the network below (See Fig. 1), the demand values are shown on vertices (supply values are negative). Lower bounds on flow and edge ca- pacities are shown as (lower bound, capacity) for each edge. Determine if there is a feasible circulation in this graph. Please complete the following steps. (A:6 (2,5) (E:-4 (5,7) (3, 8) (1,4) B:5 (4,8) (D:-4) Figure 1 (1,9) (2,5) (C:-3 (a) Remove the lower bounds on each edge. Write down the new demands on each vertex A, B, C, D, E, in this order.
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