The requirement states that administators want to see traffic going to and coming from BB1. It also states that it wants to use Netflow version 5.
This in itself is a problem. In order to see the egress flows, you must configure 'ip flow egress' on the interface. But, in order for the Netflow server to handle that, it must be version 9 - according to some information I found.
To handle the requirements, I feel the following should be done on the interface:
ip flow egress
ip flow ingress
And, the version should be changed to Version 9.