Which Car # has a Team of hendrick motorsports, and a Driver of mark martin, and a Position larger than 4?
CREATE TABLE "chevy_rock_roll_400" (
  "pos" real,
  "car_num" real,
  "driver" text,
  "make" text,
  "team" text
);
SELECT AVG("car_num") FROM "chevy_rock_roll_400" WHERE "team"='hendrick motorsports' AND "driver"='mark martin' AND "pos">4;