79050 Aircraft ailerons (wing flaps) provide vital control surfaces to maintain stability of the aircraft during flight. As such redundancies are built into the mechanism to ensure a failsafe operation. The mechanism consists of 3 quantity of wire-pulley systems each with a reliability of R, and operating in parallel, followed by a pull-gage mechanism connected in series with a constant reliability of 0.92. The wire pully-system has a constant failure rate of 8x10 5 failures per hour. Answer the following questions: (a) What are the three ways in which the functional components of a system can be arranged/assembled in terms of reliability? [3] (b) What is the reliability of the wire-pulley system at 1000" hour of operation. [2] (c) Draw a reliability block diagram of the system. [2] (d) Evaluate the overall system reliability at 1000" hour of operation. [2]