Enter ONE II an answer does not exist. AC f(I) = T2 4 31 + 2 a) Give the domain of f (in interval notation) b) Find the critical numbers of f (Separate multiple answers by commas.) c) Determine the intervals on which f is increasing and decreasing f is increasing on: and f is decreasing on: and d) Use the First Derivative Test to determine whether each critical point is a local maximum, minimum, or neither. Local maxima occur at c (Separate multiple answers by commas.) Local minima occur at (Separate multiple answers by commas!)