what is the round when the college is north carolina and the overall is more than 124?
CREATE TABLE "washington_redskins_draft_history" (
  "round" real,
  "pick" real,
  "overall" real,
  "name" text,
  "position" text,
  "college" text
);
SELECT SUM("round") FROM "washington_redskins_draft_history" WHERE "college"='north carolina' AND "overall">124;