Database: financial
Question: List out the account numbers of clients who are youngest and have highest average salary?
SQL: SELECT T1.account_id  FROM account AS T1 INNER JOIN disp AS T2 ON T1.account_id = T2.account_id INNER JOIN client AS T3 ON T2.client_id = T3.client_id INNER JOIN district AS T4 on T4.district_id = T1.district_id WHERE T2.client_id = ( SELECT client_id FROM client ORDER BY birth_date DESC LIMIT 1) GROUP BY T4.A11, T1.account_id