1. Describe the object-oriented design of the classes involved in background management. Classes, relationships, and key methods should be described with the help of a UML diagram.
2. Assume that a background image is three times the width of the screen and that the player sprite is "moving" right (i.e., the right arrow key is being pressed). As the rightmost one-third of the image "leaves" the screen, the leftmost one-third of the image must take its place. Explain how this is achieved programmatically and describe what happens when the image "leaves" the screen completely.