Find the x-values of all points where the function has any relative extrema. Find the value(s) of any relative extrema. f(x)= x-16x+64 x-10 Select the correct choice below and, if necessary, fill in any answer boxes within your choice. OA. There are no relative maxima. The function has a relative minimum of (Use a comma to separate answers as needed.) OB. There are no relative minima. The function has a relative maximum of (Use a comma to separate answers as needed.) at x= at x = OC. The function has a relative maximum of at x= and a relative minimum of (Use a comma to separate answers as needed.) at x= OD. There are no relative extrema.