Tolong Pakai Cara No 15

himpunan a=1,2,3,4,6,8,16
himpunan b= 3,6,9,12,15
himpunan c=2,4,6,8,10,12,
=a u b =3
b u c =6,12
a u c = 2,4,6
a n b n c =6
s=5,7,11,13,17,18,19