How much time did Coad make when the margin was 04:02?
CREATE TABLE "classic_competition" (
  "driver" text,
  "navigator" text,
  "vehicle" text,
  "class" text,
  "capacity" real,
  "total_time" text,
  "margin" text
);
SELECT "total_time" FROM "classic_competition" WHERE "margin"='04:02' AND "driver"='coad';