For episode number 2 what is the season viewer average?
CREATE TABLE "viewing_figures" (
  "episode_number" real,
  "season" text,
  "original_airing" text,
  "total_viewers" text,
  "audience_share_average" text,
  "season_viewer_average" text
);
SELECT "season_viewer_average" FROM "viewing_figures" WHERE "episode_number"=2;