You need to create a custom File Explorer that uses WPF for a customer. Other members of your team work on the user interface of the File Explorer. You are tasked with creating the code that handles all the I/O. The File Explorer should be an abstraction over the file system. It shouldn’t show any drives; instead, it should group files into categories that depend on the location and file type. The categories and locations are given to you by the customer. For example, you have a category “Administration” that contains Microsoft Office documents from multiple locations.