6. From the following information, develop an AON project network. Complete the forward and backward pass. compute activity slack, and identify the critical path. How many days will the project take? ID Description Predecessor Time A Survey site None 2 B Excavate site A 4 Install power lines B 3 D Install drainage B 5 E Pour foundation C D 3 7. The project information for the custom order project of the Air Control Company is presented here. Draw a project network for this project. Compute the early and late activity times and the slack times. Identify the critical path. ID Description Predecessor Time A Order review None 2 B Order standard parts A Produce standard parts A 10 D Design custom parts A 13 E Software development A IS F C.D 15 Manufacture custom hardware G Assemble B, F 10 H Test E, G 5