CREATE TABLE table_57845 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

Who built the under grid 6 car with under 49 laps?
SELECT "Constructor" FROM table_57845 WHERE "Grid" < '6' AND "Laps" < '49'
SELECT "Constructor" FROM "table_57845" WHERE "Grid" < '6' AND "Laps" < '49'