--from this
FUNCTION hire (
        last_name       VARCHAR2
      , job_id          VARCHAR2
      , manager_id      NUMBER
      , salary          NUMBER
      , department_id   NUMBER
    ) RETURN NUMBER IS
        new_empno   NUMBER;

--to this
FUNCTION hire
      ( last_name       VARCHAR2
      , job_id          VARCHAR2
      , manager_id      NUMBER
      , salary          NUMBER
      , department_id   NUMBER
      ) RETURN NUMBER IS
        new_empno   NUMBER;

--so far I got
FUNCTION hire
    ( last_name       VARCHAR2
      , job_id          VARCHAR2
      , manager_id      NUMBER
      , salary          NUMBER
      , department_id   NUMBER
    ) RETURN NUMBER IS
        new_empno   NUMBER;