Consider the function f(r) (- 00, A, [A, B), (B, C), and C, 00) where A, and C are the critical numbers and the function is not = 9r + 7x. For this function there are four important intervals: defined at B. Find A and B and C For each of the following open intervals, tell whether f(z) is increasing or decreasing. (- 00, A): Select an answer v (A, B): Select an answerv (B, C): Select an answer (C, 00) Select an answer Note that this function has no inflection points, but we can still consider its concavity. For each of the following intervals, tell whether f(z) is concave up or concave down. (- 00, B): Select an answer v (B, 00): Select an answer Check Answer