Four factories are located in an industrial park. These are factory A (x=4, y=6) with 3,000 workers, B (x=8, y=3) with 2,000 workers, C (x=6, y=8) with 4,000 workers, and D (x=7, y=5) with 1,000 workers. The management of the park decides to build a centrally located traffic center for all the staff employed by the four factories to use.

a) Where should the traffic center be located?

b) If factory E (x=12, y=15) with 2,500 workers is added to the park, what would be the new coordinates of the traffic center?