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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 ToLatLng(self):
 """ Returns that latitude and longitude that this point represents under a spherical Earth model. """

    rad_lat = math.atan2(self.z, math.sqrt(self.x * self.x + self.y * self.y))
    rad_lng = math.atan2(self.y, self.x)
    return (rad_lat * 180.0 / math.pi, rad_lng * 180.0 / math.pi)