For the function $f$ defined below <br> $\qquad \qquad f(x) =c(x+1)-20$ <br>Where $c$ is a constant and $ f(3)=4$ . Find the value of $f(-3)$

Question

$\begin{array}{1 1} (a)\;-32 \\ (b)\;30 \\(c)\;32 \\(d)\;-30 \end{array} $