Mike, who owns a dive shop in the united states, decides to take a group of his customers diving in u. s. waters. mike is aware that sharks occasionally visit the area where the divers will be visiting. he is also aware that, while stingrays are usually tame, they can become aggressive when fed. mike does not reveal that information to the group of divers going with him. the divers go down into the water, and some have squid with which to feed the stingrays. during the dive, one of the stingrays becomes agitated and latches onto diver susie's arm. susie is so disconcerted that she drops her regulator (her breathing device) from her mouth and is in considerable difficulty. another diver, billy, encounters a shark, which snaps at him. while the shark does not actually bite billy, the attack results in damage to his diving equipment. mike, who is in charge of the dive, does nothing to and leaves the other divers to return to the boat because the dive turned out to be more trouble than expected. wendy, another diver on the trip, also returns to the boat without doing anything to the divers in distress. sam, on the other hand, goes to rescue the divers who are in distress. he manages to do so but in the process he pulls his back and requires medical care. all divers are very unhappy with mike. which is true regarding whether wendy and sam had a duty to come to the assistance of the divers in peril?