Two parallel plates (4.0 cm long) are placed horizontally, and separated d = 3.0 cm. The potential difference between the plates is AV = 150 V, with a constant electric field vertically between them. An electron with speed v = 8.0 x 10 m/s enters horizontally halfway between the plates. The electron undergoes projectile motion due to the electric field. Recall AV = E . d for parallel plates. a. Find the electric field between the plates. From this, calculate the electric force and acceleration of the electron. [4 marks] b. Using kinematics, find the time it takes for the electron to travel the horizontal displacement of Ax = 4 cm. From this, determine the electron's vertical displacement Ay. [2 marks]