Calculus

(2 points) Consider the function f(x) - x/5 (x - 5). This function has two critical numbers A

(2 points) Consider the function nx) 5). 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, A1: ? [B, 00) ? The critical number A is ? t iii and the critical number B is ? There are two numbers C < D where either f" (X) = 0 or f '1 (X) is undefined. Then C = and D = Finally for each of the following intervals, tell whether f(x) is concave up or concave down.