4. Phil's consulting services has grown rapidly. Phil is now traveling extensively around the country. Phil has the liberty to live anywhere he wants but wants to decide, geographically, the ideal location to relocate to. Phil's primary clients and associated number of trips are: Client A=15 trips, coordinates (20,80) Client B=40 trips, coordinates (30,60) Client C=35 trips, coordinates (40,70) Client D=25 trips, coordinates (50,90) Where (what coordinates) should Phil Live? (15 points)