Determine the minimal cut sets of the following fault tree using top-down and bottom-up Boolean operations (Consider Remove Safety Fence and the light is poor also as a basic events).

Fall into the Mine Shaft and Die Fall into the Mine Shaft by Accident Depth and Condition in the Shaft Safety Fence Fault Walk to the Shaft Mistake Not Safety Feuse Remove Safety Fence Safety Fetice is Broken Dou't Know There is a Shant Didn't see the Shan Not Firmalar with the Area Forget There is a Shaft Absent Minded No Safety Sign The Light is Poor