Find all points of discontinuity of $f$, where $f$ is defined by $f(x) = \left\{ \begin{array} {1 1} 2x + 3,& \quad\text{ if $ x $ \(\leq 2\)}\\ 2x - 3,& \quad \text{if $x$ > 1}\\ \end{array} \right.$

Question

$\begin{array}{1 1} \text{Point of discontinuity is x=0} \\ \text{Point of discontinuity is x=-2} \\\text{Point of discontinuity is x=1} \\ \text{Point of discontinuity is x=2} \end{array}$