CREATE TABLE table_20540006_6 (attendance NUMBER, challenge_leader VARCHAR2)

What was the attendance for the game when the challenge leader was at Big East (4-2)?
SELECT MAX(attendance) FROM table_20540006_6 WHERE challenge_leader = "Big East (4-2)"
SELECT MAX("attendance") FROM "table_20540006_6" WHERE "Big East (4-2)" = "challenge_leader"