for the network below with all times indicating weeks, answer the following questions and justify your answers $($show your work$)$ a$)$ identify the critical path b$)$ if activity D slips by one week, how will the slack in activity G be impacted? c$)$ if activity K can somehow be compressed from six weeks to two weeks, perhaps by adding a significant number of resources, what will be the impact,if any, on the end date of the project?