### Your Turn

A set with one member could contain any one of the following:

$\{\text{Articuno}\}\text{,}\{\text{Zapdos}\}\text{,}\{\text{Moltres}\}\text{, or}\{\text{Mewtwo}\}$.

Any of the following combinations of three members would work:

$\{\text{Articuno, Zapdos, Mewtwo}\}$,$\{\text{Articuno, Moltres, Mewtwo}\}$, or $\{\text{Zapdos, Moltres, Mewtwo}\}$.

Serena also ordered a fish sandwich and chicken nuggets, because for the two sets to be equal they must contain the exact same items: {fish sandwich, chicken nuggets} = {fish sandwich, chicken nuggets}.

There are multiple possible solutions. Each set must contain two players, but both players cannot be the same, otherwise the two sets would be equal, not equivalent. For example, {Maria, Shantelle} and {Angie, Maria}.

### Check Your Understanding

Roster method: $\{\text{A, B, C,}\dots \text{, Z}\},$ and set builder notation: $\{x|x\text{is a capital letter of the English alphabet}\}$

To be a subset of a set, every member of the subset must also be a member of the set. To be a proper subset, there must be at least one member of the set that is not also in the subset.