CREATE TABLE table_name_4 (laps INT, grid VARCHAR, manufacturer VARCHAR, time_retired VARCHAR)

What is the lowest laps that has a manufacturer of yamaha, and a time/retired of +1:08.312, and a grid less than 20?
SELECT MIN(laps) FROM table_name_4 WHERE manufacturer = "yamaha" AND time_retired = "+1:08.312" AND grid < 20
SELECT MIN("laps") FROM "table_name_4" WHERE "+1:08.312" = "time_retired" AND "grid" < 20 AND "manufacturer" = "yamaha"