CREATE TABLE table_49911 ("Region  ( year ) " TEXT, "No. 1" TEXT, "No. 2" TEXT, "No. 3" TEXT, "No. 4" TEXT, "No. 5" TEXT, "No. 6" TEXT, "No. 7" TEXT, "No. 8" TEXT, "No. 9" TEXT)

Who was No. 9 when Ava was No. 4 and Addison was No. 6?
SELECT "No. 9" FROM table_49911 WHERE "No. 4" = 'ava' AND "No. 6" = 'addison'
SELECT "No. 9" FROM "table_49911" WHERE "No. 4" = 'ava' AND "No. 6" = 'addison'