Let $$f(x) = \frac{3 x - 6}{x^4 - 8 x^3 + 16x^2}.$$ Find each point of discontinuity of $f$, and for each give the value of the point of discontinuity and evaluate the indicated one-sided limits.

If needed, use 'INF' for $\infty$ and '-INF' for $-\infty$.
If you have more than one point, give them in numerical order, from smallest to largest.
If you have extra boxes, fill each in with an 'x'.

Point 1: $C =$
$\displaystyle{\lim_{x \rightarrow C^{-}} f(x)}$ =
$\displaystyle{\lim_{x \rightarrow C^{+}} f(x)}$ =

Point 2: $C =$
$\displaystyle{\lim_{x \rightarrow C^{-}} f(x)}$ =
$\displaystyle{\lim_{x \rightarrow C^{+}} f(x)}$ =

Point 3: $C =$
$\displaystyle{\lim_{x \rightarrow C^{-}} f(x)}$ =
$\displaystyle{\lim_{x \rightarrow C^{+}} f(x)}$ =