126) Briefly explain the wheel-of-retailing concept. 127) Describe the stages of the retail life cycle. How is it like the product life cycle? 128) What is meant by merchandise breadth and depth? Give an example of a store for each of the following: narrow assortment, broad assortment, shallow assortment, and deep assortment. 129) Compare and contrast specialty stores and convenience stores. 130) Compare and contrast the four types of discount stores. 131) Explain the differences between a multilevel network and a pyramid scheme.