Question $1$

For the sake of convenience, a laboratory staff stood on tiptoes without the help of a foot stair for taking out materials from the overhead locker on the sink. He slipped on the ground accidentally and resulted in injuring his wrist. Water stains were also found on the ground. Since the personnel working in the laboratory are professional and well$-$trained, the laboratory has been kept neat and tidy under normal conditions of use. There are also warning signs around the sink to alert laboratory staff.

a$)$ Determine if the above incident was an accident, with justification.

$(5$ marks$)$

b$)$ State FIVE hierarchy of risk control measures.

$(10$ marks$)$

c$)$ Hence, suggest THREE appropriate control measures correspondingly.

$(6$ marks$)$

d$)$ Other than occupational safety and health concern, determine if the employer have legal liability in the above incident. Please explain with respect to the incident if any.