List the level of education and income of customers ages from 30 to 55 with a true response.
ages from 30 to 55 refer to age BETWEEN 30 AND 55; RESPONSE = 'true'; income refers to INCOME_K; education level refers to EDUCATIONNUM;
SELECT T1.EDUCATIONNUM, T3.INCOME_K FROM Customers AS T1 INNER JOIN Mailings1_2 AS T2 ON T1.ID = T2.REFID INNER JOIN Demog AS T3 ON T1.GEOID = T3.GEOID WHERE T1.age >= 30 AND T1.age <= 55 AND T2.RESPONSE = 'true'