CREATE TABLE table_50661 ("Fin. Pos" TEXT, "Car No." TEXT, "Driver" TEXT, "Team" TEXT, "Laps" TEXT, "Time/Retired" TEXT, "Grid" TEXT, "Laps Led" TEXT, "Points" TEXT)

What is the grid with a +6.8359 time/retired?
SELECT "Grid" FROM table_50661 WHERE "Time/Retired" = '+6.8359'
SELECT "Grid" FROM "table_50661" WHERE "Time/Retired" = '+6.8359'