ux] = 2 sin[w} cos{a:) on (s'r, 1r) [a] Find the critical numbers of f. C] [Separate multiple answers by commas.) {b} Determine the open intervals on which 3' is increasing and decreasing. f is increasing on: E] f is decreasing on: C] {c} Use the First Derivative Test to determine whether each critical point is a relative maximum. minimum, or neither. Relative maxima occur at :r: =C] [Separate multiple answers by commas.) Relative minima occur at :t: 2 (Separate multiple answers by commas.)