x2-9 Find all critical numbers of the function y = or minimum. X-5' x*5. Then use the second-derivative test on each critical number to determine whether it leads to a local maximum Select the correct choice below and fill in any answer boxes within your choice. OA. The local maxima occur at x= and the local minima occur at x = (Type an integer or simplified fraction. Use a comma to separate answers as needed.). OB. The local maxima occur at x= and there are no local minima. (Type an integer or simplified fraction. Use a comma to separate answers as needed.) OC. The local minima occur at x= and there are no local maxima. (Type an integer or simplified fraction. Use a comma to separate answers as needed.) OD. There are no local extrema.