left has a charge of $3\mathrm{.}0q$; the other two each have a charge of $6\mathrm{.}0q.($Assume that the $+x-$axis is to the righ

$($a$)$ What is the magnitude of the force on the sphere with charge $q?$ Express your answer in terms of $k_{e^{\text{'}}}q,$ and a in symbolic form.

$F=$

$($b$)$ What is the direction of the force on the sphere with charge $q?($Enter your answer in degrees counterclockwise from the $+x-$axis.$)$

counterclockwise from the $+x-$axis