As the mobile app has been gaining popularity, users have been demanding features to allow them to combine movie information with the movies on their disk drive. Consequently, the app will now need to be able to build a representation of their disk drive. It immediately occurs to us that a Tree is the perfect data structure for this task.As the mobile app has been gaining popularity, users have been demanding features to allow them to combine movie information with the movies on their disk drive. Consequently, the app will now need to be able to build a representation of their disk drive. It immediately occurs to us that a Tree is the perfect data structure for this task. Your job is to implement a couple of data-structure methods, as well as some application-level methods.  In particular, you will implement a tree findChild() method, as well as an application method which constructs a tree to represent files organized in directories and subdirectories.