Suppose we have a database consisting of the following four relations: Student (name, studentnumber, class, major)

Course (courename, coursenumber, credithours, department)

Section (sectionidentifier, coursenumber, semester, year, instructor)

Grade_Report (studentnumber, sectionidentifier, grade)

Specify the following queries using SQL:

Retrieve the names of all senior Computer Science students who have taken all courses offered by the Computer Science department.
Retrieve the names and numbers of all students who have a grade of I(Incomplete) in any of their courses taught by Professor Yoon.