Suppose that you have a network with $8$ nodes, $1$ through $8,$ with the following links:

# From To Length

$12811$

$2134$

$34832$

$43739$

$55821$

$63822$

$72719$

$81829$

$91735$

$102328$

$111623$

$12155$

$132433$

$142618$

$156720$

$166830$

What link is not in the minimal spanning tree