Question $3$

Consider a bank that has five tellers. The arrival rate of customers, $\backslash ($ r$\_\{$a$\}\backslash ),$ is $6$ people per minute. The effective processing rate of each teller, $\backslash ($ r$\_\{$e$\}\backslash ),$ is $80$ people per hour. The utilization, $\backslash ($ u $\backslash ),$ is:$0\mathrm{.}901\mathrm{.}20\mathrm{.}0750\mathrm{.}015$