Answer true or false to the following claims providing a motivation: 1. The performance of a system can be analyzed independently from its load. 2. Let us assume a single service with a single class of requests (i.e. a single workload component). If we are under the stability condition ( < ) then the expected response time of the system is independent from the arrival pattern. 3. The workload parameters that mostly influence the performance of system are the arrival pattern and the service demands. 4. The time needed to run a simulation is upper-bounded by the simulated time 5. The reliability function R(t) associated to a component may increase after the restoration of a component.