Can I get some help finding the median of the following distribution function? Please.
$F(x) =\left\{ \begin{array}{lcc} 0 & if & x < 1 \\ \\ \frac{x-1}{5} & if & 1 \leq x < 3 \\ \\ \frac{x+1}{5} & if & 3 \leq x < 4 \\ \\ 1 & if & 4 \leq x \end{array} \right. $ Where $X$ is a random variable