Among the employees who handled orders to Brazil, who has the highest salary and calculate the average salary of them.
orders to Brazil refers to ShipCountry = 'Brazil'; highest salary refers to max(salary); average salary = AVG(Salary)
SELECT T1.FirstName, T1.LastName, AVG(T1.Salary) FROM Employees AS T1 INNER JOIN Orders AS T2 ON T1.EmployeeID = T2.EmployeeID WHERE T2.ShipCountry = 'Brazil' GROUP BY T1.FirstName, T1.LastName ORDER BY SUM(T1.Salary) DESC LIMIT 1