2. (0) Based on the project activities summary in Table 1.0 below, construct a project network diagram and identify the total project durations. (15 marks) ID Description Predecessor 1 2 Estimated Time (Days) 14 4 11 8 3 3 4 5 4 6 3,4 18 7 8 9 10 11 12 13 Start of Project Shutdown reactor Dismantle heat exchanger Dismantle reactor column Inspect shell of heat exchanger Reuse the tube bundle of heat exchanger Replace heating element of column Repair shell of heat exchanger Replace spreaders of column Reassemble heat exchangers Reassemble reactor column Start-up Testing Maintenance Table 1.0 4,5,6 1 2 8,9 1 8,11 7,10,12 13 1 1 10 1 4 2 2 14 4 3 DEN Identify the critical path for this project. (1 (iii) What will happen to the overall project if "Activity 10 - Reassemble heat exchang was delayed by FIFTEEN (15) days? Explain your answer. (2 marna