A fatal accident occurred at a construction site involving a construction worker who fell from a height. As a qualified Safety and Health Officer, you have been instructed to conduct an accident investigation to determine the cause of the incident. (a) Discuss how you would conduct an effective accident investigation using suitable investigation techniques and supporting them with diagrams or flow charts to provide an overview of an accident investigation. Provide a sample scenario. (b) Explain FOUR (4) principles of accident prevention. (12) (8)