Two charges $+5$ C and $+9$ C are placed along the x axis, with the first charge at the origin $($x$=0)$ and the second charge at x$=+1$m$.$ Find the magnitude and direction of the net force on a $-10$ nC charge when placed at the following locations below.

Overall Hint

halfway between the two charges: magnitude of force is mN$,$ and the direction is Select an answer$$in $+$x direction$$not in any direction.$$in $-$x direction$.$

on the x axis at x$=-0\mathrm{.}5$m: magnitude of force is mN$,$ and the direction is Select an answer$$in $+$x direction$$in $-$x direction$$not in any direction.$.$

at the coordinate $($x$,$y$)=(1$m$,0\mathrm{.}5$m$)($half a meter above the $+9$ C charge in a direction perpendicular to the line joining the two fixed charges$)$:

Hint for $($c$)$

Magnitude of force is mN$,$ and the direction is degrees below $-$x axis.