An autonomous delivery rover is undergoing testing along a straight path inside a logistics warehouse. The distance–time graph of its journey is shown below.

State the total distance travelled by the rover.
State the total time the journey took.
Calculate the rover's average speed during its journey.
State which section of the journey, A–E, is where the rover travels the fastest. Explain your answer.
Suggest what happens at sections B and D on the journey.
Suggest appropriate equipment a technician could use to measure the time and the distance of the journey during a physical validation test.