tlong bantuin no 6,7,8,9 plis bantuin

 6.P={8,9,10,11,12,13,14,15,16,17,18,19}
 7.n(A)=125-40=85
    n(B)=115-40=75
85+75=160
JADI n(AUB)=160
8.(AUB) diiriskan C ={1,2,3,4,5,6,7}diiriskan{1,2,3,4,5}={1,2,3,4,5}
9.A={a,b,c}=
  a.{ },himpunan kosong
  b.{a},[b},{c}
  c.{a,b},{a,c},{b,c}
  d.{a,b,c}