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Using the definition of the derivative, find f'(x). Then find f'( - 2), f'(0), and f'(3) when the derivative exists. f ( x ) = 3x + 3 Find f'(x) using the definition of the derivative. P ( x ) =0 Find f'( - 2) if the derivative exists. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A f(-2) = (Simplify your answer.) O B. The derivative does not exist. Find f'(0) if the derivative exists. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A f(0) = (Simplify your answer.) O B. The derivative does not exist. Find f'(3) if the derivative exists. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. f'(3) = (Simplify your answer.) O B. The derivative does not exist