3 \usepackage{../graphics}

     3 \usepackage{../graphics}

     4 

     4 

     5 \begin{document}

     5 \begin{document}

     6 

     6 

     7 \section*{Homework 6}

     7 \section*{Homework 6}

     8 

    10 

     9 \begin{enumerate}

    11 \begin{enumerate}

    10 \item (i) Give the regular expressions for lexing a language

    12 \item (i) Give the regular expressions for lexing a language

    11 consisting of whitespaces, identifiers (some letters followed by digits), numbers,

    13 consisting of whitespaces, identifiers (some letters followed by digits), numbers,

    12 operations \texttt{=}, \texttt{<} and \texttt{>}, and the keywords

    14 operations \texttt{=}, \texttt{<} and \texttt{>}, and the keywords