56. Consider a project that has been modeled as follows: Activity Immediate Predecessors Duration (hr) A --- 7 B --- 10 C A 4 D A 30 E A 7 F B,C 12 G B,C 1 5 H E,F 11 I E,F 25 J E,F 5 K D,H 21 L (3,1 25 a Draw the PERT/CPM network for this project and determine project's expected completion ' time and its critical path. b Can activities E and G be performed simultaneously without delaying the minimum project completion time? c. Can one person perform A, G, and I without delaying the project? d. By how much can activities G and L be delayed without delaying the entire project? How much would the project be delayed if activity G was delayed by 7 hours and activity L was delayed by 4 hours? Explain. ANSWER: E. a. Expected Completion Time = 58; Critical Path = A - D - K b. Yes c. Yes (EL Slack on G = 7 hours; Slack on L = 4 hours e. 4 hours; the slack times are not independent as G and L are on the same path