tolong Bantu ya ,ke buru dipakai

Himpunan
3)
A- B = {1,3,5,6,7,9,10,11,12,13,14}
A-C = {2,5,6,7,8,9,10,11,12,13,14}
C-B  ={1,3}
C-A = { }

4.
AUB = {1,2,3,5,7,9,11,13,...}
AnB  ={3,5,7,11,13,17,19,...}
A nC = {2}
B nC = { }
A n B n C = { }
A - B = { 2 }
B - A ={ 1 }
B -C = {1,3,5,7,9,11,13,...}
C - A = {4,6,8,10,12,...}
A -B-C = { }

5.
(XUZ) - (ZUY) = { e }
X- Z  = {c,d,e}
(X n Y) - Z = {c,d}
Y - Z = { c,d g}
(XUZ) - (YUZ) = { e}