Find (A) f'(x), (B) the partition numbers for f', and (C) the critical numbers of f. _ 3 f(x)x - 27x- 2 E (A) f'(x) = 3x2 27 (B) Find the partition numbers for f'. Select the correct choice below and. if necessary, fill in the answer box to complete your choice. {:3' A- The partition number(s) islare x = (Use a comma to separate answers as needed.) 12:} B. There are no partition numbers. The graph of the total profit P00 (in dollars) from the sale of x cordless electric screwdrivers is shown to the right. (A) Write a brief verbal description of the graph of the marginal prot function y = P'(x), including a discussion of any x intercepts. (B) Sketch a possible graph of y= P'(x). (A) On what interval(s) is the marginal prot function P'(x) positive? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (5) A. ID (Type your answer using interval notation. Use a comma to separate answers as needed.) C) B. There is no solution. A manufacturer incurs the following costs in producing x water ski vests in one day, for 0 Find the critical numbers of C(t). Select the correct choice below and, if necessary, ll in the answer box to complete your choice. v The critical number(s) islare t= 2 . (Use a comma to separate answers as needed.) There are no critical numbers of C(t). The drug concentration is decreasing on the interval(s) |:|. (Type your answer in interval notation. Use a comma to separate answers as needed.)