A Network Consists of the Activities in the Following List

Essay

A network consists of the activities in the following list. Times are given in weeks.
$$\begin{array} { | c | c | c | } \hline \text { Activity } & \text { Preceding } & \text { Time } \\\hline \text { A } & - - & 8 \\\hline \text { B } & - - & 3 \\\hline \text { C } & \text { A } & 7 \\\hline \text { D } & \text { A, B } & 3 \\\hline \text { E } & \text { C } & 4 \\\hline\end{array}$$
a. Draw the network diagram.
b. Calculate the ES, EF, LS, LF, and Slack for each activity.
c. What is project completion time?