Answer the questions below about the function whose derivative
is $f'(x) = \frac{(x-3)(x+8)}{(x+2)(x-6)}$, $x \neq -2, 6$.
a. What are the critical points of f?
b. On what open intervals is f increasing or decreasing?
c. At what points, if any, does f assume local maximum and minimum values?
a. What are the critical points of f? Select the correct choice below and, if necessary, fill in the answer box within your choice.
A. x = (Use comma to separate answers as needed)
B. The function f has no critical points.