Chapter 2.2, Problem 20E

Evaluating limits graphically Sketch a graph of f and use it to make a conjecture about the values of $f\left(a\right),\underset{x\to a^{-}}{\lim }f\left(x\right),\underset{x\to a^{+}}{\lim }f\left(x\right),$ and $\underset{x\to a}{\lim }f\left(x\right)$ or state that they do not exist.

  20.     $f\left(x\right)=\{\begin{array}{cc}3-x& \text{if }x<2\\ x-1& \text{if }x>2\end{array};a=2$