Please solve the following

(4) For the function f(x) = 4x3 + 3x2 - 6x + 1 find the intervals on which f is increasing or decreasing. (5) Complete the following First Derivative Test and draw appropriate illustrations: Suppose that c is a critical number of a continuous function f: poll gotwellat all evorg . If f' changes from positive to negative at c, then f has at c. . If f' changes from negative to positive at c, then f has at c. . If f' does not change sign at c then, f at c