Q1 Consider queries Q1,Q2,Q3,Q4 given below. These queries work on table teachers defined Teachers (LNAME,FULL_ADDRESS, SEMESTER, GRADES). (6) 1. Calculate Attribute usage matrix. 2. Calculate Attribute affinity matrix. 3. Calculate Clustered affinity matrix. Q1: Select LNAME from Teachers where MARKS = 50; - Q2: Select GRADES from Teachers; Q3: Select SEMESTER from Teachers where FULL_ADDRESS=" KABUL" Q4: Select LNAME from TEACHERS where SEMESTER! = 5; - S2 o Q1 Q2 Q3 Q4 S1 1 o 0 3 S3 S47 2 10 3 20 30 0 0 o 0