Potential customers arrive to a single-server hair salon according to a Poisson process with rate . A

Potential customers arrive to a single-server hair salon according to a Poisson process with rate λ. A potential customer who finds the server free enters the system; a potential customer who finds the server busy goes away. Each potential customer is type i with probability pi , where p1+ p2+ p3 = 1. Type 1 customers have their hair washed by the server; type 2 customers have their hair cut by the?