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