Use the graph of f'(x) and the letters A through D to answer the questions. The letters correspond to the x-coordinates of the points indicated on the graph. f '(x) (a) Use the graph of f '(x) shown above to answer the following question about f(x). Find and classify the critical points of f(x) by selecting the appropriate statement for each value of x. DOD) mg. if\"??? (b) Use the graph of f '(x) shown above to answer the following question about f '(x). Find the global maximum and minimum off '(x) on the interval [0, B] . f'(x) has a global maximum at x = f'(x) has a global minimum at x =