The following table gives the map coordinates and the shipping loads for a set of cities that we wish to connect through a central hub in North America. City Map Coordinate Shipping Load (X,Y) A (5.10) 5 B (6.8) 10 (4.9) 15 D (9.5) 5 E (7.9) 15 F (3,2) 10 G (2,6) 5 a) Near which map coordinates should the hub be located? b) If the shipments from city A triple, how does this change the coordinates?