In the graph of fin the figure, at which of the labeled x-values is each of the following true? Use a lower case x with its appropriate subscript. For example: enter x3. Pay attention to the function in the question. [(1) (a) flx) greatest? x=3 x (b) for) least? x=4 x (c) f '(x) greatest? x=5 X (d) f '00 least? x=3 x