I-Go Airlines has operations in eight cities throughout the United States. It is searching for the best location(s) to designate as a hub, which would then serve other cities within a 1,400-mile radius. For economic reasons, I-Go would like to operate no more hubs than necessary to cover all eight cities. Which of the cities in the table at the top of the page should be designated as hubs?

ATLANTA BOSTON CHICAGO DALLAS DENVER LA PHILADELPHIA SEATTLE Atlanta Boston Chicago Dallas Denve Los Angeles Philadelphia 783 1,794 937 1,406 2,366 1,990 3,017 1,0232,047 1,450 1,026 2,699 3,105 2,108 2,112 1,313 1,141 2,872 1,108 778 767 1,459 1,759 2,723