Please help

Let f(:c) = m3 + 33:2 723 + 12. (a) Use the definition of a derivative or the derivative rules to find fix) = S (b) Use the definition of a derivative or the derivative rules to find W: (c) On what interval(s) is f increasing? (d) On what interval(s) is f decreasing? (e) On what interval(s) is f concave downward? (f) On what interval(s) is f concave upward