1. **D**: The overlap of the two sets represents the intersection, which is the set of elements common to both sets *M* and *C*. In this case, it's the set {4, 5, 6}.

2. **D**: *P* is the set of the first 100 multiples of 8 (8*1 = 8, 8*2 = 16, and so on)

3. **C**: *n*(*A*) represents the number of elements in the set *A*. When

that means the sets *A* and *B* are disjoint, represented by the two circles with no overlap.

4. **E**:

is the set of elements belonging to either set *A* or *B*. The three elements of *A* are all in *B*, so *A* is a subset of *B*. This means .

Because *A* is a subset of *B*, we have .

is the complement of , which refers to the set of elements *not* belong to . These are all the numbers in *U* that are not in this union, which would be .

Because we know , we have .

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