Three charges of magnitude 3.0 ! 10-4 C each are located at x = 1.0 m, y = 0.0 m, at x = 0.0 m, y = 0.0 m, and at x = -1.0 m, y = 0.0 m. The one in the middle is positive, while the other two are negative. What is the net Coulombic force exerted by them on a negative 3.0 ! 10-5 C charge located at x = 0.0 m, y = 2.0 m?