what is the name of the employee that supported the most number of customers?
select t1.first_name, t1.last_name from employees as t1 join customers as t2 on t1.id = t2.support_rep_id group by t1.id order by count ( * ) desc limit 1
what is their id?
select t1.id from employees as t1 join customers as t2 on t1.id = t2.support_rep_id group by t1.id order by count ( * ) desc limit 1
what is their address?
select t1.address from employees as t1 join customers as t2 on t1.id = t2.support_rep_id group by t1.id order by count ( * ) desc limit 1