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 & & 1 & 5 & 12 \\ \hline C & A & 2 & 1.5 & 5 \\ \hline D & A & 3 & 3 & 4 \\ \hline E & A & 2 & 4 & 11 \\ \hline F & C & 1.5 & 2 & 4 \\ \hline G & D & 1.5 & 3 & 2.5 \\ \hline H & B, E & 2.5 & 3.5 & 7.5 \\ \hline I & H & 1.5 & 2 & 2.5 \\ \hline J & F, G, I & 1 & 2 & 3 \\ \hline \end{tabular}