A project has been defined to contain the following list of activities along with their required times for completion Activity Time (weeks) Immediate Predecessors Activity No. 1 2 3 4 5 6 7 8 9 10 Collect requirements Analyze processes Analyze data Design processes Design data Design screens Design reports Program Test and document Install 3 2 2 6 3 2 4 5 7 2 1 2 2 3 3,4 4,5 6,7 7 8.9 a. Construct a Gantt chart for the project. b. Draw a network diagram for the activities. C. Calculate the earliest expected completion time. d. Show the critical path. e. What would happen if activity 6 were revised to take six weeks instead of two weeks