An electron enters a region between two large parallel plates made of aluminum separated by a distance of 2.0 cm and kept at a potential difference of 200 v. the electron enters through a small hole in the negative plate and moves toward the positive plate. at the time the electron is near the negative plate, its speed is 4.0×105m/s.4.0×105m/s. assume the electric field between the plates to be uniform, and find the speed of electron at (a) 0.10 cm, (b) 0.50 cm, (c) 1.0 cm, and (d) 1.5 cm from the negative plate, and (e) immediately before it hits the positive plate