Sensors in the muscles and joints send messages back through peripheral nerves to tell the cerebellum and other parts of the brain where and how the arm or leg is moving and what position it's in
It is wires or the sun from outside the sun as heat which light thing
It's just speed, distance, time
Speed = D/T
Distance = SxT
Time = D/S
Therefore Speed (or velocity) = D/T = 55/1.4 = 39 MPH rounded up - FOR JOURNEY 1
Velocity = D/T = 55/2 = 22.5 MPH - FOR JOURNEY 2
To work out his average speed (velocity) you add these together and divide by 2
Average = (39+22.5)/2
Answer = 30.75MPH or 31MPH rounded up
Hope this helps :) + If I'm wrong I'm sorry lol