Câu 8,9︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎ ︎