Answer these questions please:

Use the derivative f'(x) = (x - 4)(x + 1)(x + 4) to determine the local maxima and minima of f and the intervals of increase and decrease. Sketch a possible graph of f (f is not unique). The local maximum/maxima is/are at x = (Use a comma to separate answers as needed.)Find the intervals on which f is increasing and decreasing. f(x) = 4x4 - 2x2 +11 On which interval(s) is f decreasing? O A. - CO. - 2 . (0. 2) O B. (0.2 ) O c. - co. - 31 - O D. (-00, 0), 7:00Find the values of x for which the given function is concave up, the values ofx for which it is concave down; and any points of inflection. y: x4+4x34x+5 When is the graph of v concave up? -::_:i A. x 2 I2} B. X >2 Ii} C. 0 =1 X