a. For the following schedule, draw the node network, perform the CPM calculations and mark the critical path. Establish only F-S relationships. Activity B Activity C Activity E Activity F Activity G Activity I Activity Activity N Activity O Activity P Duration 2 ABCDEFGHL-KLM 795443 603 600 inm J 8 5 3 Started; 1 day left. A change order was issued with three new activities: IPA A A B B, C b. Twelve days after the start of the project, the following information is received: Activities A and D Completed on time. Completed by end of day 11. Started on time; finished 1 day late. Not started yet. Duration changed to 7 days. Canceled C. D D F, G E, F, G, H H1 K.L Duration=4 days. IPA = None. Duration=3 days. IPA = N. H. Duration = 5 days. IPA = O, L. No successor. Given the baseline network schedule created in a., draw manually the updated network after the data date. Calculate the new project completion date. Check whether any change in the critical path occurred.