Write SQL query to solve given problem: How many clients under the age of 35 gave Eagle National Mortgage 1 star?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT COUNT(T2.age) FROM reviews AS T1 INNER JOIN client AS T2 ON T1.district_id = T2.district_id WHERE T1.Product = 'Eagle National Mortgage' AND T1.Stars = 1 AND T2.age < 35