If $(x-2)$ is a factor of $x^5-3x^4-ax^3+3ax^2+2ax+4$ is _____

Question

$\begin{array}{1 1}\large\frac{2}{3}\\-\large\frac{2}{3}\\\large\frac{3}{2}\\-\large\frac{3}{2}\end{array} $