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Breann can handle about twelve customers per hour at her one-person comic book store. The customer arrival rate averages about eight customers per hour. Breann is interested in knowing the operating characteristics of her single-channel, single-phase queuing system. Do not round intermediate calculations. Round your answers to three decimal places. customer(s) customer(s) hours hours How would Breann's queuing system operating characteristics change if she added another cashier and increased her service rate to twenty-four customers per hour? Do not round intermediate calculations. Round your answers to three decimal places. customer(s) customer(s) hours hours