The Postal Service workers who will operate the cannon are not Space Delivery Engineers and will not be able to solve math equations on the job. You must generate a table of firing solutions for angles of elevation for targets at various distances (e.g. 100m, 200m, 300m). This way, operators only need to find the range, then look up the necessary elevation based on that, and make sure the recipient gets out of the way before the package lands. how to create and show a formula which generates elevation angle solutions for any range on the Moon. Explain how and why it works.