CREATE TABLE table_name_55 (enrollment INT, team_nickname VARCHAR, founded VARCHAR)

what is the average enrollment when the team nickname is wolverines and founded is after 1817?
SELECT AVG(enrollment) FROM table_name_55 WHERE team_nickname = "wolverines" AND founded > 1817
SELECT AVG("enrollment") FROM "table_name_55" WHERE "founded" > 1817 AND "team_nickname" = "wolverines"