Here's the question you clicked on:
pleasehelpme54
If W = {1, 2, 3, 4 …} and subset Z = {positive odd integers}, what is Z'? {1, 2, 3, 4 …} { } {5, 6, 7, 8 …} {2, 4, 6, 8, …}
This is more of a math question - just letting you know for next time! And maybe this was on accident. And Z is none of those....
But then, while Z is a subset of W, Z doesn't contain any odd numbers.
{} is "empty set" and is a subset of all sets, I think.