Considering the Project Details;

1.Construct the Project Network Diagram

2.Find the Expected Duration and Standard Deviation and Variance of each Activity

3.Find the Critical path and Expected Project Completion Time

\begin{tabular}{|c|c|c|c|c|} \hline Activity & Predecessor & \multicolumn{3}{|c|}{ Duration } \\ \hline A & & Optimistic & Most Likely & Pessimistic \\ \hline B & & 20 & 10 & 5 \\ \hline C & A & 12 & 7 & 5 \\ \hline D & C & 12 & 10 & 8 \\ \hline E & D & 90 & 20 & 6 \\ \hline F & D & 14 & 60 & 30 \\ \hline G & C & 50 & 10 & 7 \\ \hline H & E, F, G & 12 & 30 & 20 \\ \hline I & B & 6 & 10 & 8 \\ \hline J & H, I & 1 & 4 & 3 \\ \hline \end{tabular}