CREATE TABLE table_4585 ("Stage" TEXT, "Start time" TEXT, "Stage name" TEXT, "Distance" TEXT, "Winning driver" TEXT, "Time" TEXT, "Avg. Speed" TEXT, "Rally leader" TEXT)

What was the average speed over 18.00km for winning driver Jean-Claude Andruet?
SELECT "Avg. Speed" FROM table_4585 WHERE "Distance" = '18.00km' AND "Winning driver" = 'jean-claude andruet'
SELECT "Avg. Speed" FROM "table_4585" WHERE "Distance" = '18.00km' AND "Winning driver" = 'jean-claude andruet'