What was the total viewership for BBC One weekly rankings larger than 7, before episode 4?
CREATE TABLE "series_3" (
  "episode_no" real,
  "airdate" text,
  "total_viewers" real,
  "share" text,
  "bbc_one_weekly_ranking" real
);
SELECT "total_viewers" FROM "series_3" WHERE "bbc_one_weekly_ranking">7 AND "episode_no"<4;