Point charge 3.0?C is located at x = 0, y = 0.30 m, point charge -3.0?C is located at x = 0 y = -0.30 m. What are
(a) the magnitude and
(b) direction of the total electric force that these charges exert on a third point charge Q = 5.0?C at x = 0.40 m, y = 0?