Create a network diagram for the following tasks:

\begin{tabular}{|l|l|} \hline Task & Predecessor \\ \hline A & \\ \hline B & A \\ \hline C & A \\ \hline D & B \\ \hline E & C \\ \hline F & C \\ \hline G & D,E,F \\ \hline H & D \\ \hline I & G,H \\ \hline \end{tabular}