Consider a troubleshooting call center, where customers wait on hold until a representative is available. Currently, there are six representatives on duty at any one time. A representative talks with a customer for an average of 16 minutes. Records show that average time for a customer to wait on hold is 36 minutes. a. On average, how many customers are on hold for the entire call center? Show all work. b. If the service were improved so that the average number of customers on hold per representative was 1.5, what would be the average wait time for a customer (in minutes)? Show all work.