Office Automation, Inc. has developed a proposal for introducing a new computerized office system that will improve word processing and interoffice communications for a particular company. Contained in the proposal is a list of activities that must be accomplished to complete the new office-system project. Information about the activities is shown below.

a. Draw the network for this project. b. Develop a schedule for the project using normal times. c. What is the critical path and the expected project-completion time? d. Assume the company wants to complete the project in 26 weeks. What crashing decisions would you recommend for meeting the completion date at the least possible cost? What is the added project cost to meet the 26-week completion time? e. Develop an activity schedule for the crashed project using early and late start times, early and late finish times and slack. Times are in weeks and costs are in thousands of dollars. \begin{tabular}{|c|c|c|c|c|c|} \hline Description & \begin{tabular}{l} Immediate \\ Predecessor(s) \end{tabular} & \begin{tabular}{l} Normal \\ Time \end{tabular} & \begin{tabular}{l} Crash \\ Time \end{tabular} & \begin{tabular}{c} Normal \\ Cost \end{tabular} & \begin{tabular}{c} Crash \\ Cost \end{tabular} \\ \hline Plan needs & - & 10 & 8 & $30 & $70 \\ \hline \begin{tabular}{l} Order \\ equipment \end{tabular} & A & 8 & 6 & 120 & 150 \\ \hline \begin{tabular}{l} Install \\ equipment \end{tabular} & B & 10 & 7 & 100 & 160 \\ \hline \begin{tabular}{l} Set up \\ training \\ lab \end{tabular} & A & 7 & 6 & 40 & 50 \\ \hline \begin{tabular}{l} Training \\ course \end{tabular} & D & 10 & 8 & 50 & 75 \\ \hline Test system & C,E & 3 & 3 & 60 & - \\ \hline \end{tabular}