2.15 Consider the sample space S = {copper, sodium, nitrogen, potassium, uranium, oxygen, zinc} and the events A = {copper, sodium, zinc}, B = {sodium, nitrogen, potassium}, C = {oxygen}.

List the elements of the sets corresponding to the following events:

(a) B

;

(b) B ∪ C;

(c) (A ∩ B

) ∪ C;

(d) A

 ∩ C;

(e) A ∩ B ∩ C;

(f) (A

 ∪ B

) ∩ (A

 ∩ C).