plsssss , ajutatima va rog

Răspuns:
1)C={3,4,5,6,7}
2)AUB={1,2,3,4,5,6,7,8}
3)BnC={4,6}
4)AnBnC={3,4,5,6}
5)A/C={1}
6)B/C={2,8}