Need help with these questions

1.Claudia and Xin stay at the Derwent Travel Express Hotel in Perth. Claudia notices that the hotel has safekeeping facilities and ensures that she deposits her valuables (expensive watch, passport and camera). Claudia and Xin decide to party at the hotel bar the night before they are due to leave and the hostess charges their drinks to their room account. The next day when they are checking out, they refuse to pay $120 for the drinks, claiming that they were both extremely drunk and should not have been served the alcohol to begin with. What are the rights of the Hotel?

2.What is an agent of necessity and under what circumstances is an agent of necessity 'appointed'? Use case law to illustrate your answer.

3.With reference only to the case of Tasman Express Line Ltd, explain what an exclusion clause is, how an exclusion clause is effective and when the exclusion clause will fail. Tasman Express Line Ltd v J I (Australia) Pty Ltd (1992) 111 FLR 108