A pool lifeguard demands money after saving bob from drowning in the pool. Bob does not have to pay the lifeguard because this is an instance of pre-existing duty.
A pool lifeguard is responsible for the general supervision and safety of swimmers by preventing and responding to emergencies. Lifeguards are superior swimmers who are able to give advice on water safety to swimmers.
When a pool lifeguard demands money after saving bob from drowning. The lifeguard should not be paid, as it is the pre-existing duty of a lifeguard to help swimmers in an emergency.
Hence, the lifeguards administers first aid in the event of injury, rescues swimmers in distress or danger of drowning.
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