skip this slide I sorry I won't go through everything in detail what I mean is I just want to tell you what an equilibrium of our system is so an equilibrium of our system involves basically saying I connect together the strategic behavior of the passengers and drivers the pricing policy and the queueing model and so what I do is I say okay let me take the queueing model compute a steady-state distribution from it using the steady-state distribution for every driver I can work out what is their expected earnings that they'll