According to MS1722:2005, a hazard is a source or a situation with a potential for harm in terms of human injury, or ill health, property damage, damage to the environment or a combination of these.
	(a)	Hazards in a workplace can arise from people being exposed to hazardous substances, processes or environments. Discuss FIVE benefits of understanding the categories of workplace hazards.
		( 10 )
	(b)	Many formal techniques have been developed for a systematic analysis of complex systems. With ONE suitable example of process and illustration, explain the methodology of conducting the Hazard and Operability Studies (HAZOP).