Pete's Market is a small local grocery store with only one checkout counter. Assume that shoppers arrive at the checkout lane according to a Poisson probability distribution, with an arrival rate of $16$ customers per hour. The checkout service times follow an exponential probability distribution, with a service rate of $20$ customers per hour.

Hire a second person to operate a second checkout counter. The two$-$server operation would have a service rate of $20$ customers per hour for each server. $($Round your answers to four decimal places. Report time in hours.$)$