Consider the function f(x) = 12x5 + 75x - 120x + 4. f(x) has inflection points at (reading from left to right) x = D, E, and F where D is and E is and F is Consider the function f(x) = xe8. f(x) has two inflection points at x = C and x = D with C < D where C is and D is Finally for each of the following intervals, tell whether f(x) is concave up or concave down. (-, C): [Select an answer (C, D): Select an answer (D, ) Select an answer Consider the function f(x) = 4(x - 5)2/. For this function there are two important intervals: (-, A) and (A, 0) where A is a critical number. A is For each of the following intervals, tell whether f(x) is increasing or decreasing. (-, A): [Select an answer (A, ): [Select an answer For each of the following intervals, tell whether f(x) is concave up or concave down. (-, A): Select an answer (A, ): [Select an answer