What was the range of finishing position for 15 awarded platinum points?
CREATE TABLE "ranking_points" (
  "finishing_position" text,
  "points_awarded_platinum" real,
  "points_awarded_gold" real,
  "points_awarded_silver" real,
  "points_awarded_satellite" real
);
SELECT "finishing_position" FROM "ranking_points" WHERE "points_awarded_platinum"=15;