a. The first phase was fairly simplistic. Draw an ERD to represent this initial phase, described by the following: A client may maintain several social media sites (e.g., for intercollegiate sports, academics, local food and beverage outlets, or a specific student organization). Each site has attributes of Site Identifier, Site Name, Site Purpose, Site Administrator, and Site Creation Date. Any person may become a participant in any public site. Persons need to register with the clients social media presence to participate in any site, and when they do the person is assigned a Person Identifier; the person provides his or her Nickname and Status (e.g., student, faculty, staff, or friend, or possibly several such values); the Date Joined the site is automatically generated. A person may also include other information, which is available to other persons on the site; this information includes Name, Twitter Handle, Facebook Page link, and SMS Contact Number. Anyone may register (no official association with the client is necessary). An account is created each time a person registers to use a particular site. An account is described by an Account ID, User Name, Password, Date Created, Date Terminated, and Date/Time the person most recently used that account. Using an account, a person creates a posting, or message, for others to read. A posting has a Posting Date/Time and Content. The person posting the message may also add a Date when the posting should be made invisible to other users. A person is permitted to have multiple accounts, each of which is for only one site. A person, over time, may create multiple postings from an account.