Question 248729
Subsets would include:

The empty set, { }.
The set S itself, {0,1,2,3}.
The subsets that have only one element (e.g. {0}, {1},...)
The subsets that have only two elements (e.g. {0,1}, {0,2}...)
The subsets that have only three elements (e.g. {,0,1,2}, {0,1,3}...)

Please finish these lists out.