Given the following partially completed Project Activity Description and Network Diagram, calculate the SLACK for ACTIVITY E.

Given the following partially completed Project Activity Description and Network Diagram, calculate the SLACK for ACTIVITY E. \begin{tabular}{|c|c|c|c|c|c|c|c|} \hline Activity & Duration & Predecessor & ES & EF & LS & LF & SLACK \\ \hline A & 3 & - & 0 & 3 & 0 & 3 & 0 \\ \hline B & 1 & A & 3 & 4 & 3 & 4 & 0 \\ \hline C & 2 & A & 3 & 5 & 4 & 6 & 1 \\ \hline D & 9 & B & 4 & 13 & 4 & 13 & 0 \\ \hline E & 6 & B, C & 5 & 11 & & & \\ \hline F & 8 & D, E & & & & & \\ \hline G & 9 & E & 11 & 20 & & & \\ \hline \hline \end{tabular}