CREATE TABLE table_55853 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

What is the average Grid that has a Time/Retired of +2 laps, and under 51 laps?
SELECT AVG("Grid") FROM table_55853 WHERE "Time/Retired" = '+2 laps' AND "Laps" < '51'
SELECT AVG("Grid") FROM "table_55853" WHERE "Laps" < '51' AND "Time/Retired" = '+2 laps'