2.

\begin{figure}[h]
\begin{center}
  \includegraphics[alt={},max width=\textwidth]{6ccce35f-4e62-4b6b-acf6-f9b3e18d4b52-04_474_958_210_555}
\captionsetup{labelformat=empty}
\caption{Figure 3}
\end{center}
\end{figure}

The network in Figure 3 shows the activities that need to be undertaken to complete a project. Each activity is represented by an arc and the duration, in hours, of the corresponding activity is shown in brackets.
\begin{enumerate}[label=(\alph*)]
\item \begin{enumerate}[label=(\roman*)]
\item Complete Diagram 1 in the answer book to show the early event times and the late event times.
\item State the minimum completion time of the project.

The table below lists the number of workers required for each activity in the project.

\begin{center}
\begin{tabular}{ | c | c | }
\hline
Activity & Number of workers \\
\hline
A & 2 \\
\hline
B & 1 \\
\hline
C & 2 \\
\hline
D & 2 \\
\hline
E & 3 \\
\hline
F & 2 \\
\hline
G & 1 \\
\hline
H & 3 \\
\hline
\end{tabular}
\end{center}

Each worker is able to do any of the activities. Once an activity is started it must be completed without interruption. It is given that each activity begins at its earliest possible start time.
\end{enumerate}\item \begin{enumerate}[label=(\roman*)]
\item On Grid 1 in the answer book, draw a resource histogram to show the number of workers required at each time.
\item Hence state the time interval(s) when six workers are required.
\end{enumerate}\end{enumerate}

\hfill \mbox{\textit{Edexcel FD1 2023 Q2 [7]}}