3. A scanning electron microscope directs an electron through a uniform electric field with a magnitude and direction of 154 N/C [right]. The charge of an electron is 1. 602 x 10 -19 C. a) If the electron moves 3.1 cm due to the field, what was the work done on it? b) If the initial speed of the electron was ? = 1. 9 x 10 m/? and the mass of an electron is m = 9. 11 x 10 "k?, what was the exiting velocity? Include the magnitude, direction and any assumptions made