Implement find_level, which takes a tree t and an integer level and returns a list of all the entries that have depth level. If no such entries exists, return the empty list.

In windows explorer, select the file, folder, or groups of files and folders you'd like to copy. you can select multiple files or folders in several ways: click the first file or folder you want to select, hold down the ctrl key, and then click each additional file or folder you want.

Answerthe arguments to the method

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