Following data refers to the activities of a project, where, node $1$ refers to the start and node $5$ refers to the end of the project.
$\begin{array}{|l|l|} \hline \textbf{Activity} & \textbf{Duration (days)} \\ \hline 1-2 & 2 \\ \hline 2-3 & 1 \\ \hline 4-3 & 3 \\ \hline 1-4 & 3 \\ \hline 2-5 & 3 \\ \hline 3-5 & 2 \\ \hline 4-5 & 4 \\ \hline \end{array}$
The critical path (CP) in the network is
- $1$-$2$-$3$-$5$
- $1$-$4$-$3$-$5$
- $1$-$2$-$3$-$4$-$5$
- $1$-$4$-$5$