1. Queueing models enable finding an appropriate balance between the cost of service and the amount of waiting. - TRUE OR FALSE 2. The assumption of constant service times cannot be used with human servers because of the inevitable variability - TRUE OR FLASE 3. A system has one service facility that can service 10 customers per hour. The customers arrive at an average rate of 6 per hour. In this case, no waiting line will form. - TRUE OR FLASE 4. Most queueing models assume that the form of the probability distribution of inter-arrival times is an exponential distribution - TRUE OR FLASE