K Enhanced Homework a Find the critical points of f x 6x e b Use the First Derivative Test to locate the local maximum and minimum values c Determine the intervals on which f is concave up or concave down Identify any inflection points A The function has critical points at x 0 4 Use a comma to separate answers as needed Question 24 7 2 98 Part 4 of 6 OB The function has no critical points b Identify the location of all the local maxima Select the correct choice below and fill in any answer boxes within your choice HW Score 80 56 198 Points 0 33 of 1 A x 4 Use a comma to separate answers as needed B There are no local maxima Identify the location of all the local minima Select the correct choice below and fill in any answer boxes within your choice Ax 0 Use a comma to separate answers as needed OB There are no local minima Identify all the intervals where f is concave up Select the correct choice below and fill in any answer boxes within your choice A fis concave up on the open interval s Use interval notation Use a comma to separate answers as needed OB I is not concave up on any intervals