what is the average points when the nation is wales and the pts/game is more than 5?
CREATE TABLE "leading_points_scorers" (
  "name" text,
  "nation" text,
  "points" real,
  "games" real,
  "pts_game" real
);
SELECT AVG("points") FROM "leading_points_scorers" WHERE "nation"='wales' AND "pts_game">5;