Answer:
This question is incomplete
Step-by-step explanation:
This question is incomplete because of the absence of the required diagram. The required diagram has however been attached to this answer with the fulcrum circled.
A fulcrum is a pivot point in a lever; it plays a centre role (but might not be at the centre) which usually determines the activity of a lever. An example of a fulcrum is the circled part in the attachment.