Write SQL query to solve given problem: What is the full address of the office where 4 people work and one of them is Sales Representation?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.addressLine1, T1.addressLine2 FROM customers AS T1 INNER JOIN employees AS T2 ON T1.salesRepEmployeeNumber = T2.employeeNumber WHERE T2.jobTitle = 'Sales Rep'