1. The purpose of this assignment is to learn to use namespaces to mix elements from different vocabularies in a single XML document. Suppose, that you keep track of your books in one XML document: Mark Twain $5.49 Walt Whitman $7.75 Washington Irving $2.95 Nathaniel Hawthorne $10.95 and that you keep track of your CDs in another XML document: Beethoven $14.95 Mozart $16.49 Now suppose you want to combine these documents into a single XML document that tracks both your collections. However if you merged those two XML documents, you would have a conflict because there are