A new social networking web application called ChainedIn (TM) that is used by professionals, job seekers, and recruiters. (think LinkedIn) A user (call it X) can log in the system, after which the user can: - edit X's profile, that includes name, education, and work history (i.e. current and prior jobs). Education consists of a list of schools (just their name) the user attended. A job's description includes just the company name. - post an update on X's own blog (like posting on the Facebook wall) - read posts written by all of user X's social network members (The following is just an explanation: by "social network" we mean a set of other users that X 'knows' and that accepted to be in X's network via invitation/confirmation. For this problem we assume a user's social network is already known/set/stored and we don't worry about managing it or about the invitation system.) Do the following: a. Write use cases "Read Recent Posts", "Edit Profile", "Write Post". Follow the format taught in class. b. Based on the features above and the use cases, identify classes, responsibilities (operations), and relationships between classes. c. Write the UML class diagram (or diagrams, if it helps having more than one). The diagram(s) must show class names, attributes with type, and methods. d. Write the UML sequence diagrams for the three use cases listed at point a. ("Read Recent Posts", "Edit Profile", "Write Post")