Consider a project with 7 activities as represented in table 1 above. The predecessors of each activity and the duration of the activities are given. The number of compressors (consider it as a resource) required by each activity is also listed. The organization has only 6 compressors available for the project. Table 2 below represents the Gantt chart of the project. Table 1 Activity A C E G D Duration (days) 3 2 5 9 1 4 2 No. of compressors 1 needed 1 5 4 6 2 - s 9 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Using a histogram, level the resources. After resource levelling what is the project duration? Activity Predecessors A B D E F G A B B C C,D E,F Duration (days) 3 2 5 4 9 2 1 No. of compressors needed 6 1 5 2 4 4 6