CREATE TABLE table_204_668 (id DECIMAL, "#" DECIMAL, "menteri besar" TEXT, "took office" TEXT, "left office" TEXT, "party" TEXT)

who was the first to take office ?
SELECT "menteri besar" FROM table_204_668 ORDER BY "took office" LIMIT 1
SELECT "menteri besar" FROM "table_204_668" ORDER BY "took office" NULLS FIRST LIMIT 1