Please solve these small questions for me

Let f(a) = 23 + 9x2 - 48x + 13. (a) Use the definition of a derivative or the derivative rules to find f' (2 ) = (b) Use the definition of a derivative or the derivative rules to find f" (20) = (c) On what interval is f increasing (include the endpoints in the interval)? interval of increasing = (d) On what interval is f decreasing (include the endpoints in the interval)? interval of decreasing = (e) On what interval is f concave downward (include the endpoints in the interval)? interval of downward concavity = (f) On what interval is f concave upward (include the endpoints in the interval)? interval of upward concavity =