solve it asap as you can

Question 2) (10 marks) Let four existing machines be located at P1=(8,5), P2=(4,2), P3 = (11,8). and P4 = (13.2). There are 9, 6, 4, and 12 trips per week, respectively, between the machines and a new facility. Determine the optimum location for a single new facility when cost is proportional to rectilinear distance. Construct a contour line passing though the point having coordinates (4, 5). Good Luck