help!! For a) both answers need to be in interval notation. I need a,b, and c answered. please write LEGIBALLY

The graph shows the position s = f(t) of a car t hours after 5:00 P M. relative to its starting point s = 0, where's is measured in miles AS 200- (a) Describe the velocity of the car. Specifically, when is it speeding up and when is it slowing down? 160- (b) At approximately what time is the car traveling the fastest? The slowest? (c) What is the approximate maximum velocity of the car? The approximate minimum velocity? 120- (a) When is the car speeding up? (Simplify your answer. Type your answer in interval notation. Round to the nearest grid line as needed. Use a comma to separate answers as needed.)