5. Consider a single server queuing system in which potential customers arrive in accordance with a Poisson process having rate 4.0. A potential customer will only enter if there are three or fewer other customers in the system when he or she arrives. The service time of a customer is exponential with rate 4.2. No additional customers are allowed after time T : 8 (all time units are per hour). Develop a simulation study to estimate the average amount of time that an entering customer spends in the system. Using; the bootstrap approach, estimate the mean square error of vour estimate