1. Explain disintermediation and reintermediation using examples. 2. Describe three different revenue models for a portal such as Yahoo! 3. What is meant by buy-side, sell-side and marketplace-based e-commerce? 4. What are the different mechanisms for online auctions? 5. Describe two alternative approaches for using e-business to change a companys value chain. 6. Explain what a business model is and relate it to an Internet pure-play of your choice. 7. Outline the elements of the e-business environment for an organization and explain its relevance to the organization. 8. Give three different transaction types that an industry marketplace could offer to facilitate trade between buyers and suppliers.