Answer: For A it is 9:30 to 13:30, For B it is 8:00 to 9:30, and for part C it is 13:30 to 15:30
Step-by-step explanation: When solving this problem you are looking at the slope relative to your starting position. Whenever there is no slope(A straight line) you are staying still, not moving any distance further away from your starting point.
When your slope is going up you are going away from the origin to some degree, depending on the steepness of your slope.
When your slope goes down you are nearing the starting position.