I'm having trouble getting started with the following question:

Find counterexamples to the following statements.

$\displaystyle A \subseteq B \Rightarrow A^c \subseteq B^c$

$\displaystyle (A \not\subseteq B) \wedge (B \not\subseteq C) \Rightarrow (A \not\subseteq C)$

$\displaystyle (A \subseteq B) \wedge (B \not\subseteq C) \Rightarrow (A \not\subseteq C)$

How should I make stuff up?