This is in MySQL. 

1. Return the names, IDS, and average salary of the top 10 employees who are Senior Engineers whose average salary is at least $110,000 in descending order.2. Find the top ten employees (names, IDs and total wages) who earned equal to or more than $200000 between 01/01/2000 and 01/01/2002. Order them in decreasing order. Assume salaries change every 12 months. For simplicity, ignore salaries that started or ended outside of the date range.3. Use a subquery to display the employee number and bottom 10 average salaries of the employees who are not ‘Staff’.