Question

please answer it fast ​

Answer 1

Answer:

1)0

2){l,m,n}

3){l,m,n}

4){l,m,n}

Answer 2

1) A∩∅=∅

2) A∪∅ =A = {l,m,n}

3) A∩A = {l,m,n}

4) A∪A = {l,m,n}