a. Activity 3: For the network below with all times indicating weeks, answer the following questions and justify your answers: What is the impact on the end date of the project if activity I slips by four weeks? b. By how many weeks can activity E slip before the project end date gets extended? c. If activity A slips by one week, how will the slack in activity D be impacted? d. If activity H can somehow be compressed from seven weeks to one week, perhaps by adding a significant number of resources, what will be the impact, if any, on the end date of the project? A, 5 D, 8 G, 5 J, 3 Start B, 4 E, 5 H, 7 End K, 7 C, 8 F, 6 1,3 Activity 4: Let the start date of the project shown in Activity 3 be January 1, 2020. Determine start dates of all the activities. Draw a Gantt chart. You may use Microsoft Excel, Gantt project, or some other software