6 ('1 point) Let an) : 63: + . Find the open intervals on which f is increasing (decreasing). Then determine the sic-coordinates of all relative maxima m (minima). 1. f is increasing on the intervals' 2. f is decreasing on the intervals ' l l 3. The relative maxima of f occur at :r: =' l l 4. The relative minima of 3' occur at a: =' Notes: In the rst two, your answer should either be a single interval, such as (0,1), a comma separated list of intervals, such as (-inf, 2), (3,4), or the word "none". In the last two, your answer should be a comma separated list of a: values or the word \"none&quot