3. Consider Table 6-3. All duration estimates or estimated times are in weeks, and the network proceeds from Node 1 to Node 8. (Note that you can easily change this table to create multiple exercises.) TABLE 6-3 Activity Initial Node Final Node Estimated Duration 00 00 00 12 00 a. Draw an AOA network diagram representing the project. Put the node numbers in circles and draw arrows from node to node, labeling each arrow with the activity letter and estimated time. b. Identify all of the paths on the network diagram and note how long they are. c. What is the critical path for this project and how long is it? d. What is the shortest possible time needed to complete this project