Two charges, $+6$C and $+15$C$,$ are fixed $1$ m apart, with the second one to the right. Find the magnitude and direction of the net force $($in N$)$ on a $7$ nC charge when placed at the following locations.

$($a$)$

halfway between the two

magnitude

$0\mathrm{.}00227$

Correct: Your answer is correct.

N

direction

to the right

Correct: Your answer is correct.

$($b$)$

half a meter to the left of the $+6$C charge

magnitude

$0\mathrm{.}00193$

Correct: Your answer is correct.

N

direction

to the right

Correct: Your answer is correct.

$($c$)$

half a meter above the $+15$C charge in a direction perpendicular to the line joining the two fixed charges $($Assume this line is the x$-$axis with the $+$x$-$direction toward the right. Indicate the direction of the force in degrees counterclockwise from the $+$x$-$axis.$)$

magnitude

$0\mathrm{.}00392$

Correct: Your answer is correct.

N

direction

$84\mathrm{.}4$

Incorrect: Your answer is incorrect.

$$ counterclockwise from the $+$x$-$axis