If I am on a train -LRB- hypothetically -RRB- moving at the speed of light -LRB- c -RRB- and I start running at a speed of 5 km/hr in the same direction as the train , am I now moving at a speed of c + 5 km/hr ?
If I am in a subway train moving at the speed of light , and I start running 5 km/hr in the same direction in the train , am I running c +5 km/hr ?