CREATE TABLE table_name_2 (grid NUMBER, manufacturer VARCHAR2, laps VARCHAR2)

What is the average grid for vehicles manufactured by Aprilia and having run more than 16 laps?
SELECT AVG(grid) FROM table_name_2 WHERE manufacturer = "aprilia" AND laps > 16
SELECT AVG("grid") FROM "table_name_2" WHERE "aprilia" = "manufacturer" AND "laps" > 16