$($a$)$ An electron moves through a uniform electric field vec$(E)=(2\mathrm{.}60$hat$(i)+5\mathrm{.}80$hat$(j))\frac{V}{m}$ and a uniform magnetic field vec$(B)=0\mathrm{.}400$hat$(k)T.$ Determine the acceleration of the electron when it has a velocity vec$(v)=6\mathrm{.}0$hat$(i)\frac{m}{s}.($Give each component in $\frac{m}{s^2}.)$

$a_x=$

$a_y=$

$a_z=,\frac{m}{s^2}$

$\frac{m}{s^2}$

$,\frac{m}{s^2}$

$($b$)$ What If$?$ For the electron moving along the $x-$axis in the fields in part $($a$),$ what speed $($in $\frac{m}{s})$ would result in the electron also experiencing an acceleration directed along the $x-$axis?

m$/$s