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Question 4 (a) Given three components, each with a reliability of 0.9. Constructing a figure, calculate the reliability of a total system in which the three components are arranged in- (i) three in series (2.5 marks) (ii) three in parallel (2.5 marks) (iii)two alternatives, where cach has different series/parallel design, and each uses a total of three components. (5 marks) (b) Identify the three types of skills needed by an effective manager, as conceived by Robert L. Katz, and describe how the relative need(s) for them might vary with the level of management. (5 marks) (c) State five support services that an organisation might provide to make the work of research and design engineers more effective. (10 marks)