Question: Write a relational algebra statement that produces a relation with the columns: course _ id title prereq _ course _ id prereq _ course _

Write a relational algebra statement that produces a relation with the columns:
course_id
title
prereq_course_id
prereq_course_title
This relation represents courses and their prereqs.
Note:
This query requires the course and prereq tables.
Your answer should only include courses in the Comp. Sci. department.
If a course has no prereqs, prereq_course_id and prereq_course_title should both be null.
You may have to use table and column renaming.
Algebra statement:

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