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 there is more than one point of discontinuity, give the points in numerical order, from smallest to largest. If there are more answer boxes provided below than points of discontinuity for the function, then fill the extra boxes with an “x”. See limits for more on limit answers. Point 1: $C =$ $\displaystyle{\lim_{x \to C^{-}} f(x) =}$ $\displaystyle{\lim_{x \to C^{+}} f(x) =}$ Point 2: $C =$ $\displaystyle{\lim_{x \to C^{-}} f(x) =}$ $\displaystyle{\lim_{x \to C^{+}} f(x) =}$ Point 3: $C =$ $\displaystyle{\lim_{x \to C^{-}} f(x) =}$ $\displaystyle{\lim_{x \to C^{+}} f(x) =}$