Lecture 11 and textbook Chapter 12 (Clan) introduced you to the potlatch ceremony of the Northwest Coast Native people.  What is the function of 1) potlatch dishes, such as Stan Wamiss' Halibut Feast Dish (fig. 5.20); 2) potlatch hats (Lecture 11); and 3) totem/crest poles, such as Arthur Shaughnessy's Interior House Post (fig. 12.15)?  Compare and contrast what the three artforms have in common and what makes them different?