The Jonas Brothers are planning their next tour and need to decide where their two Texas concerts should be. They know that it will be in either Austin, Dallas, San Antonio, Houston, Lubbock, Fort Worth, or El Paso. They also know the estimated number of fans in each city (in thousands) - 500, 750, 300, 900, 200, 150, and 300, respectively. The distance between city i and city j is dij. Formulate an IP that will minimize the maximum distance that their fans have to travel.