m4 128L132 Let m) : 7 (a) Use the definition of a derivative or the derivative rules to find W) = S (b) Use the definition of a derivative or the derivative rules to find W) = :1 (c) On what interval is f increasing (include the endpoints in the interval)? interval of increasing = S (d) On what interval is f decreasing (include the endpoints in the interval)? interval of increasing = S (e) On what interval is f concave downward (include the endpoints in the interval)? interval of increasing = I: (f) On what interval is f concave upward (include the endpoints in the interval)? interval of increasing =