$($a$)$ Determine the electric field strength at a point $1\mathrm{.}00$ cm to the left of the middle charge shown in the figure below. $($Enter the magnitude of the electric field only.$)$

Three charges lie along a horizontal line. A $6\mathrm{.}00$C positive charge is on the left. $3\mathrm{.}00$ cm to its right is a $1\mathrm{.}50$C positive charge. $2\mathrm{.}00$ cm to the right of the $1\mathrm{.}50$C charge is a $2\mathrm{.}00$C charge.

N$/$C

$($b$)$ If a charge of $7\mathrm{.}93$C is placed at this point, what are the magnitude and direction of the force on it$?$

magnitude

N

direction

$---$Select$---$