A woman walking a dog along a straight path stops and releases the dog at point a. She then continues to walk forward at a constant speed of 1.4ms-1. The dog runs 100m forward in 10 seconds stops and sniffs for 10 seconds, then runs forward a further 50m in 20 seconds. It then spots another dog 100m the other side of a and runs back to join in at 5ms-1
From what you've written it sounds like it just wants the dogs displacement. The owners constant speed is irrelevant since the dog has been released and is doing its own thing. With y axis being displacement and x being time you would have gradients of displacement/time for each section it is saying. For the first part where it says that the dog runs 100m for 10 seconds you would draw a straight line from the origin which is point A to those coordinates, the sniff section would be a horizontal line as no displacement. Then from the end of that draw a line up by 50m and across the x axis by 20 seconds. Final part you need to calculate the total distance from your current location and -100m as its 100m behind a, then divide the displacement by the velocity given to find the time of this gradient.