A point charge of -6 µC is located at x = 1 m, y = -2 m. A second point charge of 12 µC is located at x = 1 m, y = 3 m.
(a) Find the magnitude and direction of the electric field at x = -1 m, y = 0.
(b) Calculate the magnitude and direction of the force on an electron at x = -1 m, y = 0.