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AUBUC = {4 5 6 7 8} = u
b.
B-A = {6}
c.
(BnA)UC = {5 7}U{4 6 8} = {4 5 6 7 8} = u
d.
A'nB = {6 8} n {5 7 8} = {8}
e.
(AUC)-B = {4 5 6 7 8}-{5 7 8} = {4 6}
f.
(AUB)-C' = {4 5 7 8}-{5 7} = {4 8}
B-A={8}
C){468}
D){8}
E){46}
F){48}