d) Construct a second derivative sign chart to find the intervals where f (x) is concave up or down. Concave Up: Concave Down: c) Find the coordinates of the inection point(s), if any. Answer as coordinate pairs. d) Verify that the critical number(s) is/are extremum/extrema using the Second Derivative Test. 6) Make a rough sketch the graph of f (x) , labeling all points found in the previous parts. Label your axes with a scale appropriatefor the