a Find the largest possible open interval s on which f is increasing and the largest possible open interval s on which f is decreasing Select the correct choice below and if necessary fill in the answer box es within your choice 13 A The function is increasing on the open interval s 8 12 and decreasing on the open interval s 7 8 Simplify your answer Type your answer in interval notation Use a comma to separate answers as needed B The function is decreasing on the open interval s The function is never increasing Simplify your answer Type your answer in interval OC The function is increasing on the open interval s The function is never decreasing notation Use a comma to separate answers as needed Simplify your answer Type your answer in interval notation Use a comma to separate answers as needed OD The function is never increasing nor decreasing A The critical point s are located at x 8 10 Use a comma to separate answers as needed B There are no critical points b Find the critical points of f Which critical points correspond to local maxima Local minima Neither Find the critical points of f Select the correct choice below and if necessary fill in the answer box within your choice Which critical points correspond to local maxima Select the correct choice below and if necessary fill in the answer box es within your choice A The critical point s x correspond s to local maxima Use a comma to separate answers as needed B There are no critical points that correspond to local maxima