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

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