Consider the function f(2) = 23 + 6202 - 4. a) Find the critical numbers of f O (Separate multiple answers by commas.) b) Determine the intervals on which f is increasing and decreasing. f is increasing on: f is decreasing on: c) Use the First Derivative Test to determine whether each critical point is a relative maximum, minimum, or neither. Relative maxima occur at x = (Separate multiple answers by commas.) Relative minima occur at a = (Separate multiple answers by commas.)