You are given the following view table which is derived from a university staff table. [12 marks]

CREATE VIEW StaffDeptAge

AS SELECT sid, dept, age

FROM STAFF;

sid the staff id

dept the code (e.g., CS, EE) of the department that the staff works in age

the age of the staff member

Write only ONE SQL statement to answer the following.

For each department, display the department code, and a pair of staff ids (sid). The first (second) sid is the member of staff who is oldest (youngest) among all the members of staff in that department. You can assume that there is only one oldest and one youngest member of staff per department.

Your SQL should produce a result table that looks like the one below where sid1 (sid2) is the ids of the first (second) staff id:

example:

dept	sid1	sid2
Cs	s123	s125
EE	s231	s321

You are not allowed to use more than 2 SELECT or use any of these SQL keywords: WITH, EXISTS, COUNT, ORDER BY, ASC, DESC, LIMIT, TOP, NATURAL JOIN, JOIN, ON, SOME, ANY, ALL, row_number, dense_rank. Otherwise, no marks will be given