write on: GPS Explanation: A clear introduction to how GPS works. Answer the question: how does it determine the location of a signal on the planet? 3) SR Explanation: A clear explanation of why special relativity needs to be accounted for. 4) SR Calculation: Include a special relativity calculation, showing your steps, illustrating how much time measured on a satellite would differ from time measured on earth. 5) GR Explanation: A clear explanation of why general relativity needs to be accounted for. 6) GR Calculation: Include a general relativity calculation, showing your steps, illustrating how much time measured on a satellite would differ from time measured on earth