# Due Friday, January 27

For Friday:

Proof for Feedback:

Subset proof

7. Give an example of three sets $A$, $B$, and $C$, such that $A \subseteq B$, $B \subseteq C$, $C \not\subseteq A$, and $C \subseteq B$.  Optional: ask a friend to double-check your answer on discord.
8. Give an example of two sets $A$, and $B$, such that $A \in B$, and $A \subseteq B$.  (Yes, you read that right.)