Describe the full names, emails and intelligence of the students with the highest capability and salary.
full names of the students = f_name; l_name; highest capability refers to MAX(capability); highest salary refers to salary = 'high';
SELECT f_name, l_name, email, intelligence FROM student WHERE student_id IN ( SELECT student_id FROM RA WHERE salary = 'high' AND capability = ( SELECT MAX(capability) FROM RA ) )