Inside a cathode ray tube, an electron is in the presence of a uniform electric field with a magnitude of $287$ N$/$C$.$

$($a$)$

What is the magnitude of the acceleration of the electron $($in m$/$s$2)?$

$($b$)$

The electron is initially at rest. What is its speed $($in m$/$s$)$ after $1\mathrm{.}05108$ s$?$