need to complete the classes and their corresponding test classes based on the documentation in these classes. GregorianCalendar class is used to track the publication date for magazines or books. A GregorianCalendar object may be constructed by calling new GregorianCalendar() ; // for today new GregorianCalendar(year, month, day); // where month is 0 - 11 (0 indexed) More detail of its use is found in the Java library documentation. For Lookup, the consulting company created three different ways to look up products: NameLookup, IdLookup, and LowStockLookup. Again, these might not work correctly or even be completed, so test first and then fix any problems you find. The Company interface represents information about the store running the inventory system. The BooksAndMore class implements Company and serves to keep track of the inventory for an individual store. The consulting company also created an interface Money and a class Dollar that implements Money. This is used in product to track the price of a product. Although the Dollar class has been coded already, you should write tests to be sure it is fully functional. The consulting company does not have any user interface at this time. You suspect they have another employee working on something for down the road. The consulting company used the following comment, /*# insert code here */, to indicate methods that still need implementing. While