CREATE TABLE table_13408 ("Year" FLOAT, "Champion  ( average in final ) " TEXT, "Legs" TEXT, "Runner-up  ( average in final ) " TEXT, "Sponsor" TEXT, "Prize Fund" TEXT, "Champion" TEXT, "Runner-up" TEXT, "Venue" TEXT)

What is the legs when the venue is rwe-sporthalle, m lheim and the runner-up (average in final) is simon whitlock (99.59)?
SELECT "Legs" FROM table_13408 WHERE "Venue" = 'rwe-sporthalle, mülheim' AND "Runner-up (average in final)" = 'simon whitlock (99.59)'
SELECT "Legs" FROM "table_13408" WHERE "Runner-up (average in final)" = 'simon whitlock (99.59)' AND "Venue" = 'rwe-sporthalle, mülheim'