Question 626836
The set Q has 4 items: e, p, i, s


One possible subset is the entire set itself {e, p, i, s}


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Then there are subsets that have 3 items in them: 

{e,i,s}
{e,p,i}
{e,p,s}
{p,i,s}


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Then there are subsets that have 2 elements

{e,p}
{e,i}
{e,s}
{p,i}
{p,s}
{i,s}

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Then there are subsets that just have one element


{e}
{p}
{i}
{s}

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and finally, every subset has the empty set {}


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So we have the subsets 


{e, p, i, s}
{e,i,s}
{e,p,i}
{e,p,s}
{p,i,s}
{e,p}
{e,i}
{e,s}
{p,i}
{p,s}
{i,s}
{e}
{p}
{i}
{s}
{}


Note: there are 4 elements, so there are 2^4 = 16 subsets total

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