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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 get_annual_occurrence_rates(self):
 """ Calculate and return the annual occurrence rates histogram. :returns: See :meth: `openquake.hazardlib.mfd.base.BaseMFD.get_annual_occurrence_rates`. """

        mag, num_bins = self._get_min_mag_and_num_bins()
        rates = []
        for i in range(num_bins):
            rate = self._get_rate(mag)
            rates.append((mag, rate))
            mag += self.bin_width
        return rates