CREATE TABLE table_name_90 (number NUMBER, name VARCHAR2, year_end VARCHAR2)

Which Number has a Name of cooper, c. kenneth, and a Year End larger than 1984?
SELECT AVG(number) FROM table_name_90 WHERE name = "cooper, c. kenneth" AND year_end > 1984
SELECT AVG("number") FROM "table_name_90" WHERE "cooper, c. kenneth" = "name" AND "year_end" > 1984