\item \lect Model the following declarative sentences with predicate logic, as detailed as possible. Clearly indicate the intended meaning of all function, predicate, and constant symbols that you use.

\begin{enumerate}
	\item Alice has no sister.
	\item A person who wears a crown is either a king or a queen.
	\item Not everybody likes everybody.
	\item Everybody loves somebody.
\end{enumerate}