CREATE TABLE table_name_15 (points INT, year VARCHAR, chassis VARCHAR)

What are the lowest number of points with a Year of 1978, and a Chassis of ensign n177?
SELECT MIN(points) FROM table_name_15 WHERE year = 1978 AND chassis = "ensign n177"
SELECT MIN("points") FROM "table_name_15" WHERE "chassis" = "ensign n177" AND "year" = 1978