Q3 (8 points) For each department, retrieve the department name, the number of employees, and the average salary of all employees working in that department. SQL: (Hint: use aggregate functions with the grouping attribute DNO- the two common functions COUNT (on SSN), and AVERAGE) and you need to use the GROUP BY clause 04 (8 points) For each department whose average employee salary is more than $30000, retrieve the department name, the mumber of employees, and the average salary of all employees working for that department. (Hint: you may want to use the HAVING clause SQL