What are the names of students who have taken the prerequisite for the course International 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')