CREATE TABLE "teams_and_drivers" (
  "team" text,
  "car_s" text,
  "num" real,
  "driver_s" text,
  "primary_sponsor_s" text,
  "listed_owner_s" text,
  "crew_chief" text
);

Question: Who owned the team Jeremy Mayfield raced for?
SQL: SELECT "listed_owner_s" FROM "teams_and_drivers" WHERE "driver_s"='Jeremy Mayfield';

Question: Who is Jason Leffler's primary sponsor?
SQL: SELECT "primary_sponsor_s" FROM "teams_and_drivers" WHERE "driver_s"='Jason Leffler';