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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 _add_decision_criteria(self, criteria_dict):
 """ Adds Decision Criteria to the ProbModelXML. Parameters criteria_dict: dict Dictionary containing Deecision Criteria data. For example: {'effectiveness': {}, 'cost': {}} Examples ------- """

        decision_tag = etree.SubElement(self.xml, 'DecisionCriteria', attrib={})
        for criteria in sorted(criteria_dict):
            criteria_tag = etree.SubElement(decision_tag, 'Criterion', attrib={'name': criteria})
            self._add_additional_properties(criteria_tag, criteria_dict[criteria])