Thank you!

3. (10 points) For the problem description below, pick out four classes that you would implement. Do not include a Driver class or a main program, although that would be necessary if you were to write the whole program. Show the class names and data (only) in UML. Include aggregation relationship(s) that exist between classes. Do not implement any code. Glamazon.com sells all of their written content in three different formats: paper books, audio recordings, and software for their Glinderer. The content has an author, title, and date. Paper books have a number of pages, a printer, an edition and a weight. Audio recordings have a download size, a URL, and a list of available formats. Glindle software has a URL, a download size, and a version (e.g. 1.0, 2.0, 2.1, 2.2, or 3.0). Note: When you need to draw UML with aggregation, shapes work best. There is a drawing canvas below. If you draw in this box using shapes the shapes will stay together properly