4. Analysis of the external environment. a. Apply a PESTEL Analysis to analyze the macro environment of the social networking site industry. b. Apply a Porter 5 Forces Analysis to analyze the social networking site industry. c. Make a conclusion on the overall industry attractiveness. d. Is it possible to obtain a competitive advantage in this industry? e. Is it possible to obtain a sustainable competitive advantage in this industry? Section 2. 1. What is a social graph? Why is Facebook's social graph considered to be stronger than the social graph created by its competitors and predecessors? 2. How does competition in services delivered in the browser on desktop computers/laptops differ from that delivered via smartphone apps? 3. Consider Facebook's acquisitions of Instagram, WhatsApp, and Oculus VR. Was Facebook smart to make these acquisitions, and did it pay a reasonable price? What were the risks in not acting? 4. What products/apps of Facebook have failed? (feel free to do your own research) Why? 5. What is Facebook's IT infrastructure?