1.5 Marks Question Two 1) Consider the following SQL query and related relations SELECT StudId, Lname FROM Student s, Grades g, Course C WHERE s.StudId=g. StudId AND g.CrsId=c.Crsid AND Grade='A' + AND Dept ='Comp' AND Major=' Math'; Where: Student({Lname.Fnamem, Studid. Major) Grades({StudId , CrsId Grade) Course({Cname, CrsId ,Points, Dept}) a) Translate the above SQL query to a relational algebra expression. b) Draw the Query tree for above relational algebra expression in part (a)