Please answer this question in detail. Also, please make sure to show the work in excel so it helps me understand. I'll make sure to give a THUMBS UP!

\begin{tabular}{|c|c|c|c|l|} Activity & Immediate Predecessors & Immediate Followers & Duration & \multicolumn{1}{|c|}{ Description } \\ \hline A & & & 2 & Build internal components \\ \hline B & & & 3 & Modify roof and floor \\ \hline C & A & & 2 & Construct collection stack \\ \hline D & A, B & & 4 & Pour concrete and install frame \\ \hline E & C & & 4 & Build high-temperature burner \\ \hline F & C & & 3 & Install pollution control system \\ \hline G & D, E & & 5 & Install air pollution device \\ \hline H & F, G & & 2 & Inspect and test \\ \hline \end{tabular} \begin{tabular}{|c|l|l|} \hline Activity & ES & Duration \\ \hline A & & \\ \hline B & & \\ \hline C & & \\ \hline D & & \\ \hline E & & \\ \hline F & & \\ \hline G & & \\ \hline H & & \\ \hline \end{tabular}