Cây 1:
http://www.upsieutoc.com/image/cTjgI1
http://www.upsieutoc.com/image/cTj1lO
http://www.upsieutoc.com/image/cTj7iG
http://www.upsieutoc.com/image/cTjbWE
Cây 2:
http://www.upsieutoc.com/image/cTj6aN
http://www.upsieutoc.com/image/cTjU7y
http://www.upsieutoc.com/image/cTgRHY