Question Number 03: [DE Marks] a. 'v'isit pricelinecom and zapposcom and identify the various business revenue models used by both. Discuss their advantages. h. Discuss the advantages of dynamic pricing strategy over fixed pricing. What are the potential disadvantages of dynamic pricing? c. How the U.S. State of Pennsylvania sells surplus equipment? d. Explain how reverse auctions work in 323? e. Trace the revenue sources of Alihahacom. Describe the major services provided by AliBa ha.com. f. Explain how EC can reduce cycle time, improve employees' empowerment, and facilitate customer service