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\item \self Let $x$ and $y$ be the symbolic representations of the sets $X$ and $Y$ respectively, and let $\alpha$ be the symbolic encoding of an element $a$. Consider the following operations and relations between $x$, $y$, and $\alpha$:
\begin{enumerate}[A.] \item $x \rightarrow y$ \item $\alpha \models x$ ? \item $x \wedge \neg y$ \item $\alpha \nvDash y$ ? \item $x \equiv \bot$ ? \item $x \vee y$ \end{enumerate}
For each of the following items, state which of the above operations symbolically performs the respective set operation or answers the respective set-specific question. Write the letters of the corresponding operation/question into the boxes of the items below. Note that some of the items below do not correspond to any of the above operations or questions. Put a ``--'' in the box of these items.
\begin{itemize} \item[\Huge{$\square$}] Union: $X \cup Y$ \item[\Huge{$\square$}] Intersection: $X \cap Y$ \item[\Huge{$\square$}] Set Difference: $X \setminus Y$ \item[\Huge{$\square$}] Containment: $a \in X$? \item[\Huge{$\square$}] Subset: $X \subseteq Y$? \item[\Huge{$\square$}] Strict Subset: $X \subset Y$? \item[\Huge{$\square$}] Emptiness: $X=\emptyset$? \item[\Huge{$\square$}] Equality: $X=Y$? \end{itemize}
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