For the function below, find (A) f'(x), (B) the partition numbers for f. (C) the critical numbers off. f(x)= 7 x+4 (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 choic OA. The partition number(s) is/are x= OB. There are no partition numbers. (Use a comma to separate answers as needed.) (C) Find the critical numbers of f. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. The critical number(s) is/are x= OB. There are no critical numbers. (Use a comma to separate answers as needed.)