An electron with a speed of 5.83 x 108 cm/s enters an electric field of magnitude 4.92 x 103 N/C, traveling along the field in the direction that retards its motion. (a) How far in meters will the electron travel in the field before stopping momentarily and (b) how much time will have elapsed? (c) If the region containing the electric field is 4.98 mm long (too short for the electron to stop within it), what fraction of the electron's initial kinetic energy will be lost in that region?