Between these queries (Query 1 - 6), which would produce the same results having these applied on our class running example, the University relational database with the small size tables? select distinct course_id from section where semester = Fall" and year = 2009 and course_id in (select course_id from section where semester = 'Spring' and year 2010); select course_id from section where semester = 'Fall' and year = 2009 intersect select course_id from section where semester = 'Spring' and year = 2010; select course_id from section where semester = "Fall" and year = "2009" and semester = "Spring" and year 2010"; select T.course_id from section as T, section as S where T, semester = "Fall" and T.year = "2009" and S.semester = "Spring" and S.year = "2010" and T.course_id = S.course_id; select course id from section as S where semester = 'Fall' and year = 2009 and exists (select * from section as T where semester = 'Spring' and year = 2010 and S.course_id T.course_id select course_id from section as T in section as S using (course_id) where T.semester = "Fall" and T. year = "2009 and S.semester = "Spring" and S.year = "2010