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Sketch the graph of the following function. List the coordinates of where extrema or points of inection occur. State where the function is increasing or decreasing as well as where it is concave up or concave down. f(x) = 3x3 36x 6 What are the coordinates of the relative extrema? Select the correct choice below and, if necessary, ll in the answer box to complete your choice. O A- The coordinates of the relative extrema are (Simplify your answer. Type an ordered pair. Type an exact answer using radicals as needed. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.) O B. There are no relative extrema