Customer interarrival times at a store are exponentially distributed with rate $8$ customers per hour.

Customers are served by a single customer service representative $($CSR$),$ at a rate of $10$ customers

per hour. Service times are also exponentially distributed.

Which of the following statements are true?

The store has no customers $16\%$ of the time.

The average wait time for the CSR is $30$ minutes.

None of the answers are correct.

The average number of customers waiting in line for the CSR in the store is $3\mathrm{.}2.$

The probability of having exactly one customer in the store is $0\mathrm{.}200.$