Q1. A typical firm requires different information systems to support different levels of business operations, management, and planning needs. Describe the characteristics and the roles of TPS (Transaction Processing System), MIS (Management Information System), DSS (Decision Support System), and ESS (Executive Support System) in an organization. Q2. Many firms today enhance business communication and collaboration by embracing the social business model. Tools such as Facebook, Twitter, Line, Yammer, WeChat, and the customer rating/feedback systems on Yelp, Amazon, etc. are gaining more and more usages. Explain why engaging employees, customers, and suppliers so that their opinions are transparent/public could be beneficial to the business. What could be some possible disadvantages? What are possible issues or impacts to the involved parties?