By how much, on average, would the total number of customers (the sum of those in all queues plus those in all servers) change if two servers were pooled in the following setting:

1) Before pooling, there are two servers each with their own queue.

2) Each server has an arrival rate of 5 customers per hour, arriving randomly.

3) Each server has a processing time of 10 minutes per customer, with a standard deviation of 10 minutes.

Remember, the question is asking about the TOTAL number of customers in all queue(s) plus those in all servers.