What's the lowest average for a swimsuit over 6.89, evening gown over 7.76, and an interview over 8.57 in illinois?
CREATE TABLE "preliminary_competition" (
  "state" text,
  "interview" real,
  "swimsuit" real,
  "evening_gown" real,
  "average" real
);
SELECT MIN("average") FROM "preliminary_competition" WHERE "swimsuit">6.89 AND "evening_gown">7.76 AND "state"='illinois' AND "interview">8.57;