Which of the following statements regarding absolute extrema is/are correct? An absolute extremum of a function over a given interval always occurs at a critical point. The location of an absolute extremum is an x-value. The location of an absolute extremum is a y-value. An absolute extremum of a function over a given interval is a maximum or minimum of the function over the interval. An absolute extremum of a function over a given interval never occurs at an endpoint of the interval. An absolute extremum of a function over a given interval may occur at an endpoint of the interval. An absolute extremum is an x-value. O An absolute extremum is a y-value.

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