What are the lowest points with a Chassis of zakspeed 841, and a Year smaller than 1985?
CREATE TABLE "complete_world_championship_formula_one_" (
  "year" real,
  "chassis" text,
  "engine_s" text,
  "tyres" text,
  "points" real
);
SELECT MIN("points") FROM "complete_world_championship_formula_one_" WHERE "chassis"='zakspeed 841' AND "year"<1985;