Given the University Schema above, specify the following queries using relational algebra. Retrieve the name and Transcript of each senior student (class = 5) majoring in COSC. Transcript includes course name, course number, credit hours, semester, year, and grade for each course completed by the student. Retrieve the names and major departments of all straight A students (students who have a grade of A in all their courses) Retrieve the names and major departments of all students who do not have any grade of A in any of their courses