CREATE TABLE table_15406 ("Name" TEXT, "Team" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT, "Points" FLOAT)

What is the lowest grid that Paul Tracy had when he had over 4 points?
SELECT MIN("Grid") FROM table_15406 WHERE "Name" = 'paul tracy' AND "Points" > '4'
SELECT MIN("Grid") FROM "table_15406" WHERE "Name" = 'paul tracy' AND "Points" > '4'