A $4\mathrm{.}7-C$ point charge is located at $x=1\mathrm{.}2m,y=3\mathrm{.}2m,$ and a $-3\mathrm{.}9-C$ point charge is located at $x=1\mathrm{.}9m,y=-1\mathrm{.}9m.$

$($a$)$ Find the magnitude and direction of the electric field at $x=-3\mathrm{.}1m,y=1\mathrm{.}1m.$

magnitude $2548\mathrm{.}1$

kN$/$C

direction

$($b$)$ Find the magnitude and direction of the force on a proton at $x=-3\mathrm{.}1m,y=1\mathrm{.}1m.$

magnitude $$

N

direction