Simplify the set expression (A∪B)∩(A∪Bc)∩(Ac∪B)(A \cup B) \cap (A \cup B^c) \cap (A^c \cup B)(A∪B)∩(A∪Bc)∩(Ac∪B) for any two subsets AAA and BBB of a universal set UUU.
A∩BA \cap BA∩B
A∪BA \cup BA∪B
A∩BcA \cap B^cA∩Bc
∅\emptyset∅