Subparagraph (b) of the rule is designed to add a duty to a lawyer rendering legal services in an emergency situation. The commentary associated with Model Rule 1.1 suggested that the requirement of competence might be relaxed in certain emergency situations. It was felt that such a relaxation should be made a substantive part of the rule with the added duties that the assistance shall continue only as long as the emergency exists and the client be fully advised of the limitations on the lawyer’s competence.