9. (15 points) Let f(x) = x-4x A. Find the intervals where f(x) is increasing and...

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9. (15 points) Let f(x) = x-4x A. Find the intervals where f(x) is increasing and where it is decreasing. B. Find the local maximum and minimum values, if any. Specify both the x and y coordinates of each point. C. Find the regions where the graph of f(x) is concave up and where it is concave down, and the inflection points. D. Sketch the graph of f(x). Be sure to use enough points to get an accurate graph. 9. (15 points) Let f(x) = x-4x A. Find the intervals where f(x) is increasing and where it is decreasing. B. Find the local maximum and minimum values, if any. Specify both the x and y coordinates of each point. C. Find the regions where the graph of f(x) is concave up and where it is concave down, and the inflection points. D. Sketch the graph of f(x). Be sure to use enough points to get an accurate graph.