At which of the marked values of a is A. f(x) greatest? x = B. f(x) least? a C. f'(x) greatest? D. f'(x) least? x = E. f"(x) greatest? F. f"(x) least? x = | x3 x4 x5 x6 x1 x2 (Note that this is a graph of f', not a graph of f.)

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A:

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A:

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