A function is given below. Evaluate the indicated limits numerically.
Enter INF for $\infty$, -INF for $-\infty$, or DNE if the limit does not exist, but is neither $\infty$ nor $-\infty$.

a) $\displaystyle \lim_{x \to 2^-} f(x)$ =
b) $\displaystyle \lim_{x \to 2^+} f(x)$ =
c) $\displaystyle \lim_{x \to 2} f(x)$ =