List the product and its issues of the complains of clients with age greater than the 60% of average age of all clients.
age greater than the 60% of average age refers to age > multiply(avg(age) , 0.6)
SELECT DISTINCT T2.Product, T2.Issue FROM client AS T1 INNER JOIN events AS T2 ON T1.client_id = T2.Client_ID WHERE T1.age * 100 > ( SELECT AVG(age) * 60 FROM client )