Use the first derivative test to find the location of all local extrema in the interval (0, 4) for the function given below. f(x) = -x² In (3x) If there is more than one local maximum or local minimum, write each value of a separated by a comma. If a local maximum or local minimum does not occur on the interval, enter Ø in the appropriate box. Enter exact answers. Provide your answer below:

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