this is a risk assessment course; this question is about ETA and FTA

please help as soon as, it is urgent

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In a research lab at AnNajah National University, A waterre ghting system is consists of 2 water-pumps operated by one engine, and connected to water-sprinkling valve. A schematic drawing of the system is shown below. T Fire pump 1 Fire pump 2 . FP1 _ FP2 'l E"'" l Each pump is repaired usually every 10 years. with a failure rate of 5x10'3 per year. The engine is checked periodically each year, and has a failure rate of 0.01 The valve is usually replaced when malfunctioning. or every 5 years, and based on the manufacturer has a failure rate of 4x102. Failure of each component are denoted as: VF = Valve failure CI = No output from any ofthe fire pumps G2 = No water from FP1 GB = No water from FP2 FP1 = failure of FP1 EF = Failure of engine FP2 = Failure of FP2 The probability of re occurring in the lab is 0.1. The lab is occupied by researchers 40% of the year, and they can escape from the lab in case of emergency by 50%. Given that someone is in the area when ignition occurs, the probability of an employee (researcher) of being killed is 0.2 What is the frequency of no water from pumps in the water reghting system? What is the frequency of the top event "No water from the water reghting system"? Prepare an event tree with initiating event (top event) "re in the la \" and end events "employee lled' and "employee not killed". What is the probability of an employee (researcher) being killed due to re providing only water reghting system exists