Whsts the name of the student thst took prerequisite course  title internatoinal finance?
select t1.name from student as t1 join takes as t2 on t1.id = t2.id where t2.course_id in ( select t4.prereq_id from course as t3 join prereq as t4 on t3.course_id = t4.course_id where t3.title = 'International Finance' )
What is the  title of course id 787?
select title from course where course_id = 787
What is the department name of course id 787?
select dept_name from course where course_id = 787