Plouj

\documentclass[11pt,twoside,a4paper]{article}
\usepackage{enumerate}
\usepackage{graphicx}
\begin{document}
\today
\begin{enumerate}
    \item \begin{enumerate}[a)]
        \item
            \begin{figure}
                \includegraphics{Diagram1}
            \end{figure}
        \item
...