what is the highest qualifying rank where the competition is olympic trials, the final-rank is 4 and qualifying score is 15.100?
CREATE TABLE "2008_season" (
  "year" real,
  "competition" text,
  "location" text,
  "event" text,
  "final_rank" text,
  "final_score" text,
  "qualifying_rank" real,
  "qualifying_score" text
);
SELECT MAX("qualifying_rank") FROM "2008_season" WHERE "competition"='Olympic Trials' AND "final_rank"='4' AND "qualifying_score"='15.100';