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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 _l_cv_weight_factor(self):
 """ Return multiplier for L-CV weightings in case of enhanced single site analysis. Methodology source: Science Report SC050050, eqn. 6.15a and 6.15b """

        b = 0.0047 * sqrt(0) + 0.0023 / 2
        c = 0.02609 / (self.catchment.record_length - 1)
        return c / (b + c)