What is the highest Strike Rate when the average is less than 50.25 with less than 13 matches played?
CREATE TABLE "best_economy" (
  "player" text,
  "team" text,
  "matches" real,
  "overs" real,
  "economy_rate" real,
  "wickets" real,
  "average" real,
  "strike_rate" real,
  "best_bowling" text
);
SELECT MAX("strike_rate") FROM "best_economy" WHERE "matches"<13 AND "average"<50.25;