What was the A Score when the B Score was 9.05, and position was larger than 6?
CREATE TABLE "qualified_competitors" (
  "position" real,
  "gymnast" text,
  "a_score" real,
  "b_score" real,
  "total" real
);
SELECT AVG("a_score") FROM "qualified_competitors" WHERE "b_score"=9.05 AND "position">6;