CREATE TABLE table_78176 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

What is the average grid that has over 8 laps, a Time/Retired of +2 laps, and peter gethin driving?
SELECT AVG("Grid") FROM table_78176 WHERE "Laps" > '8' AND "Time/Retired" = '+2 laps' AND "Driver" = 'peter gethin'
SELECT AVG("Grid") FROM "table_78176" WHERE "Driver" = 'peter gethin' AND "Laps" > '8' AND "Time/Retired" = '+2 laps'