The questions are in the photos below: I would like them all solved correctly.

Question 13 Letf (x) = x' - 3x2 - 9x+25. Not yet answered Use the derivative f'(x) = 3 x2 - 6x - 9 to determine the following values for f on the interval [-4, 2]. Marked out of The absolute maximum occurs at x = 1.00 Flag The value of the absolute maximum is question The absolute minimum occurs at x = The value of the absolute minimum isQuestion 8 Suppose the derivative of a function f (x) isf'(x) = (x - 2)(x + 6). Not yet answered (a) On which open interval is f(x) decreasing? Use interval notation, for example, oo(a,b) is the same as a