[Q2-1-Q2-3] The company 'Perfect Delivery Corporation' has to design its logistic system to distribute its services to potential customers. A consultant Lee suggests two system designs (System I and System II), and the company will choose one of them. The reliability block diagrams of both options and all the component reliability information are shown below. All the units are hours. System I System II Components Failure Density Distribution 1 2 3 4 Uniform (10,20) Exp (1/15) Normal (15,5) Uniform (5,25) Q2-1. At t = 20, what are reliability values of Systems I and II? Are they the same? Q2-2. Please find MTBF (Mean Time Between Failures) of Components 1, 2, 3, and 4. What do you observe? Q 2-3. Please find reliability values of Systems I and II at t = 15. Which system is more reliable? [Q2-4-Q2-6] Consider a network shown below. There are five components in the network. Q2-4. Please list up all the possible paths from left to right. How many paths are there? (Hint: One of the paths is A-C->E. Please find all the other paths including this.) Q2-5. Among all the paths that you have found in Q 2-5, do you think there is (are) any dependent/ redundant path(s)? Please explain. Q 2-6. Based on what you have found in Q 2-5 & 2-6 (removing the redundant), please redraw the system above as a connection of parallel and/or serial systems.