A={1,2,3,4}
B={4,5,6,7,8}
C={0,1,2,4,5,6,9}
a)AUB={1,2,3,4,5,6,7,8}
b)AUC={0,1,2,3,4,5,6,9}
e)AnC={1,2,4}
f)BnC={4,5,6}
