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.

City A Map Coordinate (x, y) (5,10) Shipping Load B (6,8) (4,9) D (9.5) 5 10 15 5 E (7,9) F (3,2) (2,6) 15 10 5 G

a) Near which map coordinates should the hub be located?

b) If the shipments from city A triple, how does this change the coordinates?