4) Company X wants to build a new warehouse close to its core customers to increase the service level provided to them. To do so a new study must be performed. You are asked to find a suitable location for the new warehouse to serve your key customers. The volume demands of these customers are 1000 for Customer A, 2000 for Customer B, 2000 for Customer C, 10000 for Customer D. Their coordinates are given in the chart below. Use "Center of Gravity" method to find the location of the new warehouse. 120 60 0 0 Customer A (30,120) Customer D (60,40) 60 Customer B (90,110) Customer C (130,130) 120