network model and Jackson networks are great because they're steady-state distribution is a product alright so despite the fact that there's all these dependencies in the queuing network the the steady-state distribution has the property that in steady state the queue lengths in the different you know parts of the network look like they're independent okay so in particular here what it means is that the number of available drivers is something which we have like an exact expression for the for the for the steady-state distribution okay so I'll