Please show the employee first names and ids of employees who serve at least 10 customers.
SELECT T1.FirstName ,  T1.SupportRepId FROM CUSTOMER AS T1 JOIN EMPLOYEE AS T2 ON T1.SupportRepId  =  T2.EmployeeId GROUP BY T1.SupportRepId HAVING COUNT(*)  >=  10
SELECT T1.FirstName ,  T1.SupportRepId FROM CUSTOMER AS T1 JOIN EMPLOYEE AS T2 ON T1.SupportRepId  =  T2.EmployeeId GROUP BY T1.SupportRepId HAVING COUNT(*)  >=  10
[{'FirstName': 'Luís', 'SupportRepId': 3}, {'FirstName': 'Bjørn', 'SupportRepId': 4}, {'FirstName': 'Leonie', 'SupportRepId': 5}]