An electric utility is planning its annual project of shutting down one of its steam boilers for maintenance and repair, an analysis of this project has identified the following principal activities and their expected times and relationships. Immediate Activity Time (days) Predecessor -IOTMONO> A.B.F E.G.H a. Prepare a project network diagram. b. Calculate the scheduling times and total slack for each activity. C. List the critical path activities and project duration. Question 10.7 from extra blackboard questions