CREATE TABLE table_name_20 (highest INT, average VARCHAR, capacity VARCHAR)

What's the highest with a capacity of greater than 4,000 and an average of 615?
SELECT MAX(highest) FROM table_name_20 WHERE average = 615 AND capacity > 4 OFFSET 000
SELECT MAX("highest") FROM "table_name_20" WHERE "average" = 615 AND "capacity" > 4 OFFSET 000