How to realize which is a FEASIBLE TREE SOLUTION for UPPER BOUND TECHNIQUE?

What is the different of the initial tree solution when having or having Upper bound ?

=80 A "AB = A B B OpV -70 -10) -20 D J 07- 5 10V ED J MT Se 10 F St- opV . B AB =101 n =80 A "AB = A B B OpV -70 -10) -20 D J 07- 5 10V ED J MT Se 10 F St- opV . B AB =101 n