$1.$ An electron is moving at $3\mathrm{.}0105$ m$/$s in the positive x direction. A magnetic field of $0\mathrm{.}80$ T is in the positive z direction. The magnetic force on the electron is: A$)0$ N B$)4\mathrm{.}51014$ N in the positive z direction C$)4\mathrm{.}51014$ N in the negative z direction D$)4\mathrm{.}51014$ N in the positive y direction E$)4\mathrm{.}51014$ N in the negative y direction