What is the smallest area of territorial waters with an exclusive economic zone area more than 704,849 and a percentage of total area greater than 6.8?
CREATE TABLE "marine_ecozones" (
  "ecozone" text,
  "area_km_territorial_waters" real,
  "area_km_exclusive_economic_zone" real,
  "percentage_of_total_area_for_eez" real,
  "percentage_of_marine_area_for_eez" real
);
SELECT MIN("area_km_territorial_waters") FROM "marine_ecozones" WHERE "area_km_exclusive_economic_zone">'704,849' AND "percentage_of_total_area_for_eez">6.8;