Question $6$

List all internal $($branch$)$ vertices for the following tree:

$$ v$1,$ v$2,$ v$5,$ v$6,$ v$8$

v$1,$ v$2,$ v$3,$ v$4$

v$3,$ v$4,$ v$7$

v$5,$ v$6,$ v$7,$ v$8$

Other