$($a$)$ Explin Hazop, prepare the template and give the example

$($b$)$ Consider a rail network for high $-$speed trains. For each of the flllowing events or conditions, select one of the following categorses which best describes it: hazard, initiating event, component failure mode, satefy function, co$-$effector, accident.

Bestly explain the reason for your selection in each Case including any alsumptions you make about the sylem bounday.

a$)$ Tree falling across rails

b$)$ Train with passengers abord coming of rails

c$)$ Reduced visibility due to fog

d$)$ Train driver does not respond to stop signal

e$)$ Train re$-$scheduled due to network trafic