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Consider the function f(2) - 123 + 30a* - 160x + 4. f(T) has inflection points at (reading from left to right) x = D, E, and F where D is and E is and F is For each of the following intervals, tell whether f(2 ) is concave up or concave down. (-00, D): Select an answer (D, E): Se Select an answer (E, F): Se Concave Up (F, 0.: S Concave Down