Here is the database schema that we will be using for the SQL queries:

student $($snum$,$ sname, major, standing, age$)$

faculty $($fid$,$ fname, deptid$)$

course $($cname$,$ meets$\_$at$,$ room, fid$)$;

enrolled $($snum$,$ cname$)$

a$.$ Return all 'Computer Science' majors who are younger than all 'Psychology' majors.

$\backslash ([3\backslash$mathrm$\{$M$\}]\backslash )$

b$.$ Return all faculty members $($fid$,$ fname, and number of courses taught$)$ who teach more courses than all other faculty. If more than $1$ faculty member teaches the maximum, then show all that teach the maximum number of courses.

$\backslash ([4\backslash$mathrm$\{$M$\}]\backslash )$