Here, we want to get the set resulting from the given set operations
a) This set is the complement of the intersection of the subsets C and D
The intersection refers to that set that has its members as the elements present in both subsets
The intersection here is;
Now, the complement here are the other elemnts present in the universal set
We have this as;
b) Here, we want to get a union
The complement of set C are the elements that not present in set C but are in the universal set
So, the union here is are the list of elements in both set, without no repetitions