CA-ex-1CA-ex-2CA-ex-3CA-ex-4CA-ex-5CA-ex-6CA-ex-7CA-ex-8CA-ex-9CA-ex-10CA-ex-11CA-ex-12CA-ex-13CA-ex-14CA-ex-15CA-ex-16CA-ex-17CA-ex-18CA-example-1CA-example-2