question 3 pls

Homework2 Suppose we have 3 tables which are Users, Videos and Ratings. Each user has a userID (primary key) and name. Each video has a videolD(primary key), uploader (UserID --- Foreign key), length(seconds), and title. Each vedio (UserID + VideolD) is given a rating from 1 to 5 . Table 1: Users Table 2: Videos Table 3: Ratings 2. For the following math expression: rating>4 (Videos Ratings) How many, and which, are the columns of the answer? (1point) How many tuples are in the results? (2 points) Give, as a table, all of the tuples returned by the query. (3 points) 3. write math expression for the following query (3 points) Query: selects the uploader of all videos under 20 seconds