CREATE TABLE table_204_511 (id DECIMAL, "number" DECIMAL, "driver" TEXT, "entrant" TEXT, "chassis" TEXT, "engine" TEXT, "tyre" TEXT)

who was the last driver to finish driving a jaguar ?
SELECT "driver" FROM table_204_511 WHERE "engine" = 'jaguar' ORDER BY "number" DESC LIMIT 1
SELECT "driver" FROM "table_204_511" WHERE "engine" = 'jaguar' ORDER BY "number" DESC NULLS LAST LIMIT 1