Find the critical numbers of . (Separate multiple answers by commas. Enter NONE if there are no values.)

Determine the intervals on which is increasing and decreasing. interval
is increasing on:
is decreasing on:

Use the First Derivative Test to determine whether each
critical point is a relative maximum, minimum, or neither. (Separate multiple values by commas. Enter NONE if there are no values.)
Relative maxima occur at
Relative minima occur at