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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 last_week_of_year(cls, year):
 """Return the last week of the given year. This week with either have week-number 52 or 53. This will be the same as Week(year+1, 0), but will even work for year 9999 where this expression would overflow. The first week of a given year is simply Week(year, 1), so there is no dedicated classmethod for that. """

        if year == cls.max.year:
            return cls.max
        return cls(year+1, 0)