tolong bantu ya ka! jangan lupa pake cara. terimakasih

Nomer 4
{∅} jawaban B

Nomer 5
P = {2, 3, 5, 7, 11}
himp bag P = 2^5
himp bag P = 32 jawaban D

Nomer 6
A = {1, 3, 5, 15}
B = {2, 3, 5, 7}
A ∪ B = {1, 2, 3, 5, 7, 15} jawaban D

Nomer 7
A = {3, 6, 9, 12, 15, 18}
B = {6, 7, 8, 9, 10, 11, 12}
A ∩ B = {6, 9, 12} jawaban B