Add extra list task instructions

exercises/lists/task.tex

@@ -5,3 +5,11 @@ unordered list (\code{latex}{itemize}) with sub-lists \emph{Ingredients}
 and \emph{Instructions}. 
 Within these, there shall be an unordered list of ingredients and an ordered list of 
 instructions, respectively.
+
+\subsection*{Extra tasks: Special enumerations}
+
+\begin{compactitem}
+    \item Try using \textbf{Roman numerals} in the ordered list.
+    \item Make the ordered list \textbf{start at 7} (keyword: \texttt{\textbackslash setcounter}).
+    \item Reduce the \textbf{white space} between the items in the unordered list.
+\end{compactitem}