4. Suppose in a hairstyling shop every 30 minutes one customer will arrive, and one leaves every 20 minutes after getting service. Suppose there is (only) a hairdresser and there are two waiting...

Extracted text: 4. Suppose in a hairstyling shop every 30 minutes one customer will arrive, and one leaves every 20 minutes after getting service. Suppose there is (only) a hairdresser and there are two waiting chairs, meaning that no more than 3 customer can be present in this a hairstyling shop. Calculate (using Table 1), how long a customer should wait? What is he in table 1. (N = System Capacity, a = x/µ, p = à/(cp) Po PN Poap Lo el(1-p) , A(l - PN) he wo + Table 1: Parameters for M/M/c/N queuing system