Find (A) f'(x), (B) the partition numbers for f', and (C) the critical numbers of f. f(x) =x - 75x + 8 (A) f'(x) = (B) Find the partition numbers for f'. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The partition number(s) is/are x = (Use a comma to separate answers as needed.) O B. There are no partition numbers. (C) Find the critical numbers for f. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The critical number(s) is/are x = (Use a comma to separate answers as needed.) O B. There are no critical numbers