The drawing shows an electron entering the lower left side of a parallel plate capacitor and exiting at the upper right side. The initial speed of the electron is $3\mathrm{.}26$ x $106$ m$/$s$.$ The capacitor is $2\mathrm{.}00$ cm long, and its plates are separated by $0\mathrm{.}150$ cm$.$ Assume that the electric field between the plates is uniform everywhere and find its magnitude.