(a) For the network shown in Figure 4.23, write out the set covering problem formulation if the coverage distance is 19. (b) Solve the set covering problem for this network with a coverage distance of...

(a) For the network shown in Figure 4.23, write out the set covering problem formulation if the coverage distance is 19.

(b) Solve the set covering problem for this network with a coverage distance of 19. Clearly indicate which, if any, locations can be eliminated because they are dominated by other locations (and specify

the identity of the dominating node for each dominated node). Also, clearly indicate which, if any, nodes must be in the solution and why they must be included.