QUESTION 3 (LEARNING OUTCOME 6) A circuit system consists of four types of components, namely component A, B, C and D. The following reliability block diagram presents the circuit system. A D C In Supply to system B B B D A a) Draw a fault tree to illustrate the top event "No power supply to the system"; (6 MARKS) b) Use minimum cut set method to rank the importance of all the four components as the main cause to the top event? (6 MARKS) Assume component A to D are different and have reliabilities 0.9, 0.92, 0.95 and 0.98 respectively, which is the critical path (minimum cut set with highest probability) driving the top event