Chapter 1.1, Problem 7ES

In these exercises, make reasonable assumptions about the graph of the indicated function outside of the region depicted.

For the function $f$ graphed in the accompanying figure, find

(a) $\underset{x\to 3^{-}}{\lim }f\left(x\right)$

(b) $\underset{x\to 3^{+}}{\lim }f\left(x\right)$

(c) $\underset{x\to 3}{\lim }f\left(x\right)$

(d) $f\left(3\right)$ .