Please explain how to solve this question. Thanks

Let ea) : 0125.34 + 2.21:3 + 8322. (a) Use the definition of a derivative or the derivative rules to find f ' v) = (b) Use the definition of a derivative or the derivative rules to find w = (c) On what interval is f increasing? (d) On what interval is f decreasing? (o) On vvhat interval is f concave downward? (f) On what interval is f concave upward