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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 _compute_mean(self, C, mag, dists, rake):

 """
 Compute and return mean value without site conditions,
 that is equations 2-5, page 970.
 """

        mean = (
            self._compute_magnitude_scaling_term(C, mag) +
            self._compute_geometric_decay_term(C, mag, dists) +
            self._compute_faulting_style_term(C, rake) +
            self._compute_anelestic_attenuation_term(C, dists)
        )

        return mean