For the network illustrated below with all times indicating weeks, answer the following questions: a. What is the impact on the end date of the project if activity I slips by three weeks? b. By how many weeks can activity D slip before the end date gets extended? c. If activity A slips by one week, how will the slack in activity G be impacted? d. If activity H can somehow be compressed from seven weeks to two weeks, perhaps by adding a significant number of resources, what will the impact, if any, on the end date of the project?