# exercise package: use alphabetical counter for questions

I'm using the exercise package, and instead of Questions of an exercise being numbered, I'd like them to use letters, for instance a. , b. , c. and so on.

I tried to use

\renewcommand\theQuestion{\alph{Question}}


but it didn't change anything. Not sure which counter I'm supposed to change...

MWE:

\documentclass{article}
\usepackage[lastexercise]{exercise} % for exercise environment
\renewcommand\theQuestion{\alph{Question}}

\begin{document}

\begin{Exercise}
\Question first question.
\Question second question.
\end{Exercise}

\end{document}


Nevermind, I found the solution by realizing that I could redefine the \QuestionNB command as such:
\renewcommand{\QuestionNB}{\alph{Question}.\ }

(In the original package the command is defined as \newcommand{\QuestionNB}{\arabic{Question}.\ }