Answer Happy

URGENT!
Identify all statements characterizing an inference engine
Select one or more:
It depends on a knowledge representation schema that was used to
describe knowledge
It is typically closely integrated with the knowledge base
It interprets and evaluates facts stored in the knowledge
base
It is a part of any intelligent system
It is used to support problem-solving, answer user’s questions
or build an action plan
It stores formally described domain knowledge
It is typically separated from the knowledge base
It is a part of any knowledge-based intelligent system
It is a set of operational algorithms of an intelligent
system