What are the IDs of problems that the staff member Dameon Frami reported?
select product_id from problems as t1 join staff as t2 on t1.reported_by_staff_id = t2.staff_id where t2.staff_first_name = "Dameon" and t2.staff_last_name = "Frami"
What are the IDs of problems that the staff member Jolie Weber reported?
select product_id from problems as t1 join staff as t2 on t1.reported_by_staff_id = t2.staff_id where t2.staff_first_name = "Jolie" and t2.staff_last_name = "Weber"
What is the most common problem ID reported by all staff?
select problem_id from problems as t1 join staff as t2 on t1.reported_by_staff_id = t2.staff_id group by problem_id order by count ( * ) desc limit 1