My question is; The Input in poisson f input per second.

My question is;
The Input in poisson f input per second. the server can fail and time to repair is exponentially distributed
How to draw a continuous-time Markov chain model, event rates are f, 1/S, λ, μ. f = 2, S = 0.8, λ = 0.4, μ = 0.9?
what will be the Loss Probability, and the mean response time of a message that is not lost using Little’s formula and how to solve the Markov chain to compute the steady-state probabilities by hand, showing the manipulations?