A project involves fourteen (14) activities identified by the code letters A to N. The table below indicates the sequence in which the activities must be undertaken. Construct an Activity on Arrow network diagram, for the project.

\begin{tabular}{|c|c|} \hline Activity & Code letter of any immediately preceding activity or activities \\ \hline A & \\ B & \\ C & B \\ D & A \\ E & A, B \\ F & A \\ G & C, E \\ H & C \\ I & F \\ J & F, G, H \\ K & I \\ L & K, J \\ M & J \\ N & J \\ \hline \end{tabular}