$21\mathrm{.}35-$ A $+2\mathrm{.}00$ nC point charge is at the origin, and a second $-5\mathrm{.}00$ nC point charge is on the $x-$axis at $x=0\mathrm{.}800m.($a$)$ Find the electric field $($magnitude and direction$)$ at each of the following points on the $x-$axis: $($i$)x=0\mathrm{.}200m$; $($ii$)x=1\mathrm{.}20m$; $($iii$)x=-0\mathrm{.}200m.($b$)$ Find the net electric force that the two charges would exert on an electron placed at each point in part $($a$).$ Can you use gresa format I want to see