please help me I need to get this one right thank you!!

A project network is showh in the foure \begin{tabular}{|c|c|c|c|c|c|c|c|c|} \hline Mcthity & Precedesce Activitien & Activity Time (weeks) & Es & is & ef & IF & slock & Craical path? \\ \hline A & & 9 & & & & & & {[sinedv)} \\ \hline e & & 8 & & & & & & \\ \hlinec & & & & & & & & - Sriect \\ \hline D & & 4 & & & & & & \\ \hline E & & 12 & & & & & & \\ \hline f & I & 19 & & & & & & \\ \hline E. & & e & & & E & & & -luked-V \\ \hline & & 5 & & & H & & & Elates - 8 \\ \hline 1 & & 4 & & & & & & \\ \hline \end{tabular} A project network is showh in the foure \begin{tabular}{|c|c|c|c|c|c|c|c|c|} \hline Mcthity & Precedesce Activitien & Activity Time (weeks) & Es & is & ef & IF & slock & Craical path? \\ \hline A & & 9 & & & & & & {[sinedv)} \\ \hline e & & 8 & & & & & & \\ \hlinec & & & & & & & & - Sriect \\ \hline D & & 4 & & & & & & \\ \hline E & & 12 & & & & & & \\ \hline f & I & 19 & & & & & & \\ \hline E. & & e & & & E & & & -luked-V \\ \hline & & 5 & & & H & & & Elates - 8 \\ \hline 1 & & 4 & & & & & & \\ \hline \end{tabular}