Which students manage to generate the highest income. State his/her full name along with the income source.
name of students means the full name; full name refers to first_name, last_name; generate the highest income refers to MAX(income.amount);
SELECT T1.first_name, T1.last_name, T2.source FROM member AS T1 INNER JOIN income AS T2 ON T1.member_id = T2.link_to_member GROUP BY T1.first_name, T1.last_name, T2.source ORDER BY SUM(T2.amount) DESC LIMIT 1