A point charge q1 = -2.0 C is at the origin, and a second point charge q2 = +5.4 C is at the point x = 1.3 m, y = 3.0 m.
(a) Find the x and y coordinates of the position at which an electron would be in equilibrium.
(b) Find the x and y coordinates of the position at which a proton would be in equilibrium.
(c) Suppose the charges q1 and q2 were both doubled. How would your answers change?