For a construction project, the main activities are shown in table (3), the following is required: I. Using the precedence diagram method, draw the network for the activities given in the following table and show the critical path. II. Draw the bar chart and the histogram for resource X. Then level Resource X so that its' weekly usage does not exceed 30. III. Determine the scheduled timing of the activities if the maximum weekly usage of resource X is 25. IV. What is the total float of D and H after resource allocation (step III) Act. No. A B D E F G H I K M Table 3, List of project activities Predecessor Duration (weeks) 4 10 2 6 5 4 3 2 5 2 2 A A B, D B, D F B, D G, H E, G K, I Resource X per activity 52 60 18 54 50 32 27 26 90 22 18