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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 tail(self, n=5):
 """Return MultiIndex with the last n values in each column. Parameters n : int Number of values. Returns ------- MultiIndex MultiIndex containing the last n values in each column. """

        # not computing slice here to use with __getitem__ because we'd need to use len which is eager
        return MultiIndex([v.tail(n) for v in self.values], self.names)