# Discuss the continuity of the function $f$, where $f$ is defined by $f(x) = \left\{ \begin{array} {1 1} 3 ,& \quad\text{ if  0  $\leq x$ $\leq1$}\\ 4,& \quad\text{if  1  < $x$ < 3 }\\ 5 ,& \quad\text{ if  3  $\leq x$ $\leq10$}\\ \end{array} \right.$
$\begin{array}{1 1} \text{f is not continuous at} x=-1 \;and \;x=3 \\ \text{f is continuous at}x=1\;and\;x=3 \\ \text{f is not continuous at} x=1 \;and\; x=3 \\ \text{Can not be determined} \end{array}$