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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 _ycbcr2rgb(self, mode):
 """Convert the image from YCbCr mode to RGB. """


        self._check_modes(("YCbCr", "YCbCrA"))

        (self.channels[0], self.channels[1], self.channels[2]) = \
            ycbcr2rgb(self.channels[0],
                      self.channels[1],
                      self.channels[2])

        if self.fill_value is not None:
            self.fill_value[0:3] = ycbcr2rgb(self.fill_value[0],
                                             self.fill_value[1],
                                             self.fill_value[2])

        self.mode = mode