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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 _UTMLetterDesignator(Lat):
 """ This routine determines the correct UTM letter designator for the given latitude returns 'Z' if latitude is outside the UTM limits of 84N to 80S Written by Chuck Gantz- chuck.gantz@globalstar.com """


        if   84 >= Lat >= 72: return 'X'
        elif 72 >  Lat >= 64: return 'W'
        elif 64 >  Lat >= 56: return 'V'
        elif 56 >  Lat >= 48: return 'U'
        elif 48 >  Lat >= 40: return 'T'
        elif 40 >  Lat >= 32: return 'S'
        elif 32 >  Lat >= 24: return 'R'
        elif 24 >  Lat >= 16: return 'Q'
        elif 16 >  Lat >= 8:  return 'P'
        elif  8 >  Lat >= 0:  return 'N'
        elif  0 >  Lat >=-8:  return 'M'
        elif -8 >  Lat >=-16: return 'L'
        elif -16 > Lat >=-24: return 'K'
        elif -24 > Lat >=-32: return 'J'
        elif -32 > Lat >=-40: return 'H'
        elif -40 > Lat >=-48: return 'G'
        elif -48 > Lat >=-56: return 'F'
        elif -56 > Lat >=-64: return 'E'
        elif -64 > Lat >=-72: return 'D'
        elif -72 > Lat >=-80: return 'C'
        else:                 return 'Z'