CREATE TABLE table_name_13 (laps INT, driver VARCHAR, grid VARCHAR)

How many laps for denny hulme with under 4 on the grid?
SELECT SUM(laps) FROM table_name_13 WHERE driver = "denny hulme" AND grid < 4
SELECT SUM("laps") FROM "table_name_13" WHERE "denny hulme" = "driver" AND "grid" < 4