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.

$=,$

$P_0=,$

$L_s=$ customer$(s)$

$L_q=$ customer$(s)$

$W_s=$ hours

$W_q=$ 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.

$=,$

$P_0=,$

$L_s=$ customer$(s)$

$L_q=$ customer$(s)$

$W_s=$ hours

$W_q=$ hours