Please Help me in this Process Economics and Management Question .

The table below is the basic project activity list for a cement production factory: Activity identifier Description Preceding Estimated duration activity (months) A Preapprovals and permissions 4 B Design A 6 C Planning A 5 D Construction and Installation B, C 22 E Operation Training B 6 TI Commissioning and Delivery E,D 4 Develop an "activity on Node" network diagram for this project. Using the critical pass method, answer the following questions based on the network diagram and CPM analysis: A) When will be the early start for activity D? When will be the late finish for activity C? C) When will be the late start for activity E? D) Based on the data, how long does the project take to complete? What are the activities on the critical pass for this project