\begin{tabular}{|c|c|c|c|c|c|c|c|c|c|} \hline \multirow[b]{2}{*}{ Activity } & \multicolumn{3}{|c|}{ Time (weeks) } & \multirow{2}{*}{\begin{tabular}{c} Immediate \\ Predecessor(s) \end{tabular}} & \multirow[b]{2}{*}{ Activity } & \multicolumn{3}{|c|}{ Time (weeks) } & \multirow{2}{*}{\begin{tabular}{l} Immediate \\ Predecessor(s) \end{tabular}} \\ \hline & a & m & b & & & a & m & b & \\ \hlineA & 4 & 8 & 10 & -1 & G & 3 & 3 & 4 & C,E \\ \hline B & 2 & 8 & 23 & A & H & 1 & 1 & 1 & F \\ \hlinec & 9 & 12 & 18 & A & 1 & 7 & 7 & 7 & F \\ \hline D & 4 & 7 & 10 & A & 3 & 4 & 7 & 12 & D, G, H \\ \hlineE & 1 & 2 & 4 & B & K & 1 & 1 & 4 & 1,3 \\ \hline f & 16 & 3 & 20 & & & & & & \\ \hline \end{tabular}