Please answer all parts, thank you!

Consider the function f(x) - 12 + 452" - 80x + 2. f(z) 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() is concave up or concave down. ( - 00, D): Select an answer V (D, E): |Select an answer V (E, F): Select an answer v (F, co): |Select an