(2 points) Consider the function f (x) = x1"5 (x 6). This function has two critical numbers A

(2 points) Consider the function f (x) = xl/5(x 6). This function has two critical numbers A < B Then A = Hint: and B For each of the following intervals, tell whether f(x) is increasing or decreasing. (00, A]: ? [B, 00) ? The critical number A is ? and the critical number B is There are two numbers C < D where either (x) = 0 or (x) is undefined. Then C = and D = Finally for each of the following intervals, tell whether f (x) is concave up or concave down. (-00, C): ? (D, 00) ?