Answer:
To find the set (AUB)' n C, we first need to find the union of sets A and B, which is the set of all elements that belong to either A or B or both:
AUB = {1, 2, 3, 5, 6}
The complement of AUB, denoted by (AUB)', is the set of all elements in U that do not belong to AUB:
(AUB)' = {4, 7, 8}
Next, we need to find the intersection of (AUB)' and C, which is the set of all elements that belong to both (AUB)' and C:
(AUB)' n C = {1}
Therefore, the set (AUB)' n C contains only the element 1.