Question 2 (a) Discuss the reliability challenges for electro-mechanical drive trains in offshore wind and marine energy applications. Give qualitative examples comparing different machine types in these applications. [20%] (b) Explain how the reliability of electro-mechanical drive trains can be estimated or evaluated using data from operational systems. Consider how data from one operational environment or application could be adapted to evaluate a similar system in a different environment or application. (c) A sub-system within a wave energy converter consists of two different components in series. (ii) What effect does the failure of one component have on the system and why? Draw the state space diagram of the system (!!!) (iv) [20%] Showing your complete working, show and solve the system of equations to find the limiting state probabilities for the system. From (c)(iii), give the expression for the probability that the system is in a failed state. [60%]