Delta Tau Chi is a college fraternity and is recruiting new members. Although hazing is banned, the members nevertheless take the pledges to the local zoo, where they hand them bows and ribbons and order them to break into the monkey house exhibit and decorate the inhabitants. The monkey house has a distinct sign stating. "DANGEROUS ANIMALS, DO NOT APPROACH OR ENTER THE PREMISES!" The pledges go in anyway, and two of the pledges are severely injured and sue the zoo for their injuries. Discuss the liability of the zoo and the pledges