A book salesperson who lives in Basin must call once a month on four customers located in Wald, Bon, Mena, and Kiln before returning home to Basin. The following table gives the distances in miles among the different cities. Basin Wald Bon Mena | Kilm Basin 120 220 150 210 Wald 120 80 110 130 Bon 220 80 160 185 Mena 150 110 160 190 Kilm 210 130 185 190 The objective is to minimize the total distance traveled by the salesperson. Develop the full LP associated with this problem.