Table 2. Failure Types and Frequencies for Steam Boiler. Failure Type Water level detector Electrical fault Pressure switch fail Relief valve fail Frequency (per year) Effect 0.15 (a) 0.05 (a) or (b) 0.2 0.05 (b) Using the information supplied, construct a simple fault tree for the top event injury to the operator). In your answer (for clarity, as it will be handwritten) identify the TOP EVENT, the AND gates and OR gates, as well as the 1", 2nd and 3rd level EVENTS [30] Using the expected frequencies nrovided in Tahle until the Table 2. Failure Types and Frequencies for Steam Boiler. Failure Type Water level detector Electrical fault Pressure switch fail Relief valve fail Frequency (per year) Effect 0.15 (a) 0.05 (a) or (b) 0.2 0.05 (b) Using the information supplied, construct a simple fault tree for the top event injury to the operator). In your answer (for clarity, as it will be handwritten) identify the TOP EVENT, the AND gates and OR gates, as well as the 1", 2nd and 3rd level EVENTS [30] Using the expected frequencies nrovided in Tahle until the