For the following questions, assume the following database schema: Users (UserID INTEGER, Name CHAR(30), Age INTEGER, ReviewCount INTEGER) Businesses (BusinessID INTEGER, BName CHAR(30), City CHAR(20), State CHAR(2)) Checkins (BusinessID INTEGER, Weekdays INTEGER, Weekends INTEGER) Reviews (ReviewID INTEGER, UserID INTEGER, BusinessID INTEGER, Stars REAL) Reviews (UserID) is a foreign key referring to Users (UserID). Reviews (BusinessID) is a foreign key referring to Businesses (BusinessID). Checkins (BusinessID) is a foreign key referring to Businesses (BusinessID).A page is 8 kB in size (1kB = 1024B). The RDBMS buffer pool has 10,000 pages, all of which are available. Initially, the buffer pool is empty. The relation instances have the following statistics. Assume there are no NULL values. Each integer or real is 8B, and each character is 1B (so as an example CHAR(20) is 20B).Relation Number of PagesUsers 75,000Businesses 42,000Checkins 20,000Reviews 500,000

answer; 5,000 to 100.000 typical is the minimum coverage,now every state is different;

a  social news website  is an  internet  website  that features  user-posted stories. such stories are ranked based on popularity, as voted on by other users of the site or by website administrators. users typically comment online on the news posts and these comments may also be ranked in popularity. since their emergence with the birth of  web 2.0, social news sites have been used to link many types of information, including news, humor, support, and discussion. all such websites allow the users to submit content and each site differs in how the content is moderated. on the  slashdot  and  fark  websites,  administrators  decide which articles are selected for the front page. on  reddit  and  digg, the articles that get the most votes from the community of users will make it to the front page. many social news websites also feature an online comment system, where users discuss the issues raised in an article. some of these sites have also applied their voting system to the comments, so that the most popular comments are displayed first. some social news websites also have a  social networking  function, in that users can set up a user profile and follow other users' online activity on the website.