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ANSWER
{},{1},{3},{5},{7},{1,3},{1,5},{1,7},{3,5},{3,7},{5,7},{1,3,5},{1,3,7},{3,5,7},{1,5,7},{1,3,5,7}
EXPLANATION
The given set is {1,3,5,7}.
This set has
subsets.
Where n=4 is the number of elements in the set.
Recall that the null set is a subset of every set and every set is a subset of itself.
The subsets are:
{}
{1},{3},{5},{7}
{1,3},{1,5},{1,7},{3,5},{3,7},{5,7}
{1,3,5},{1,3,7},{3,5,7},{1,5,7}
{1,3,5,7}