CREATE TABLE table_name_71 (laps INTEGER, grid VARCHAR(255), manufacturer VARCHAR(255), rider VARCHAR(255))
What is the average laps when the manufacturer is yamaha, and the rider is garry mccoy and the grid is smaller than 4?
    
SQL: SELECT AVG(laps) FROM table_name_71 WHERE manufacturer = "yamaha" AND rider = "garry mccoy" AND grid < 4