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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _read_journal(self):
 """Extracts the USN journal from the disk and parses its content."""

        root = self._filesystem.inspect_get_roots()[0]
        inode = self._filesystem.stat('C:\\$Extend\\$UsnJrnl')['ino']

        with NamedTemporaryFile(buffering=0) as tempfile:
            self._filesystem.download_inode(root, inode, tempfile.name)

            journal = usn_journal(tempfile.name)

            return parse_journal(journal)