(Solved): The graph of the derivative f of a function f is shown. (a) On what interval is f increasing? (E ...

The graph of the derivative $$f^{?}$$ of a function $$f$$ is shown. (a) On what interval is $$f$$ increasing? (Enter your answer using interval notation.) ? On what intervals is $$f$$ decreasing? (Enter your answer using interval notation.) (b) At what values of $$x$$ does $$f$$ have a local maximum or minimum? (Enter your answers as a comma-separated list.)