--- a/coursework/cw01.tex	Sat Jan 07 14:56:45 2017 +0000
+++ b/coursework/cw01.tex	Sat Jan 21 00:25:09 2017 +0000
@@ -94,10 +94,10 @@
 
 \subsection*{Question 2}
 
-This question does not require any implementation. From the
+From the
 lectures you have seen the definitions for the functions
 \textit{nullable} and \textit{der} for the basic regular
-expressions. Give the rules for the extended regular
+expressions. Implement the rules for the extended regular
 expressions:
 
 \begin{center}
@@ -123,6 +123,9 @@
 \item $L(der\,c\,r)) = Der\,c\,(L(r))$
 \end{itemize}
 
+\noindent
+Give the implementation and the text-version of the clauses above.
+
 \subsection*{Question 3}
 
 Implement the following regular expression for email addresses
@@ -170,7 +173,8 @@
 
 \noindent
 Also test your regular expression matcher with the regular
-expression $a^{\{3,5\}}$ and the strings
+expressions $a^{\{3,5\}}$ and $(a^?)^{\{3,5\}}$. Test whether the
+strings
 
 \begin{enumerate}
 \setcounter{enumi}{4}
@@ -181,7 +185,7 @@
 \end{enumerate}
 
 \noindent
-Does your matcher produce the expected results?
+are matched or not. Does your matcher produce the expected results?
 
 \subsection*{Question 5}