Tell me the lowest prom for class of hewitt and peak of cushat law and height more than 615
CREATE TABLE "the" (
  "peak" text,
  "height_m" real,
  "prom_m" real,
  "class" text,
  "parent" text
);
SELECT MIN("prom_m") FROM "the" WHERE "class"='hewitt' AND "peak"='cushat law' AND "height_m">615;