A charge - 3.0*10-9 C is placed at the origin of an XY coordinate system, and a charge 2.0x10- C is placed at the point (x =0, y = 4 cm). If a third charge 4.0x10-s is how placed at the point (x =3, y = 4 cm), Find the magnitude and direction of the resultant force on this charge by the other two