don't answer the first question

Question 1: Differentiate between the following items Efficiency and effectives support your answer with clear example. - Administration and management support your answer with clear example. Push and pull supply chain support your answer with clear example. Sales and marketing support your answer with clear example. Question 2: explain how Wal-Mart used information systems to achieve its competitive advantage. In addition short report about Wal-Mart in general. Question 3: explain how AMAZON used information systems to adopt new business models. In addition short report about AMAZON in general. Question 4: give one example about success story for one organization that used information systems to achieve competitive advantage through competing on global scale. Question 5: define the business models, list and discuss 7 examples of the business models. And how these business .models help the firms to compete in the marketplace