List all the problem ids!
select problem_id from problems
What are the names of the staff members that reported each!
select t1.problem_id, t2.staff_first_name, t2.staff_last_name from problems as t1 join staff as t2 on t1.reported_by_staff_id = t2.staff_id
Show me the ids of those reported by the last name Bosco!
select t1.problem_id from problems as t1 join staff as t2 on t1.reported_by_staff_id = t2.staff_id where t2.staff_last_name = "Bosco"