--- a/day1/handout.tex	Fri Oct 09 16:59:30 2009 +0530
+++ b/day1/handout.tex	Fri Oct 09 17:04:07 2009 +0530
@@ -491,14 +491,14 @@
 [ 0.0 ,  0.5,  1.0 ,  1.5,  2.0 ,  2.5,  
   3.0 ,  3.5,  4.0 ,  4.5,  5.0 ]
 \end{verbatim}
-  \item[3.4a] Use the \texttt{linspace} function and generate a list of N tuples of the form\\
+  \item[3.4] Use the \texttt{linspace} function and generate a list of N tuples of the form\\
 \texttt{[($x_1$,f($x_1$)),($x_2$,f($x_2$)),\ldots,($x_N$,f($x_N$))]}\\for the following functions,
 \begin{itemize}
   \item \texttt{f(x) = sin(x)}
   \item \texttt{f(x) = sin(x) + sin(10*x)}.
 \end{itemize}
 
-\item[3.4b] Using the tuples generated earlier, determine the intervals where the roots of the functions lie.
+\item[3.5] Using the tuples generated earlier, determine the intervals where the roots of the functions lie.
 \end{description}
 
 \section{IO}
@@ -510,6 +510,7 @@
     print word.capitalize()
   \end{verbatim}
 
+\section{Problem Set 4}
   \begin{description}
     \item[4.1] Given a string like, ``1, 3-7, 12, 15, 18-21'', produce the list\\
       \texttt{[1,3,4,5,6,7,12,15,18,19,20,21]}