CREATE TABLE table_11351 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

What is the average number of laps for grid 8?
SELECT AVG("Laps") FROM table_11351 WHERE "Grid" = '8'
SELECT AVG("Laps") FROM "table_11351" WHERE "Grid" = '8'