CREATE TABLE table_40139 ("Rider" TEXT, "Manufacturer" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

What is the lowest grid number when Colin Edwards is the rider?
SELECT MIN("Grid") FROM table_40139 WHERE "Rider" = 'colin edwards'
SELECT MIN("Grid") FROM "table_40139" WHERE "Rider" = 'colin edwards'