What would be the query for enlisting the faculty member who does not teach any class using outer join?

Tables: Faculty(facid,facname,......) Student(stuid,stuname,.......) Class(facid,course,.......)

select f.facid, f.facname from class c,faculty f where c.facid(+)=f.facid and c.course is null order by f.facname;

select f.facid, f.facname from class c right join faculty f on c.facid(+)=f.facid where c.course is null order by f.facname;

select f.facid, f.facname from class c,faculty f where c.facid(+)=f.facid(+) and c.course is null order by f.facname;

select f.facid, f.facname from class c full join faculty f on c.facid=f.facid where c.course is null order by f.facname;

all of the above