You are given the graph of a function f. 411 -3-2-1 123 -1+ Determine the intervals where the graph of fis concave upward and where it is concave downward. (Enter your answers using interval notation.) concave upward (-∞0,4), ((4,00)) concave downward Find the inflection point of f, if any. (If an answer does not exist, enter DNE.) (x, y) =

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