A functional manager who has had no project management training gets frustrated with you because you are concerned about finding the critical path in your schedule network diagram, so the manger calls you out about it, wanting to know what the big deal is. What do you do? You explain to the functional manager that between the two of you, you are the project management expert, and politely ask the manager to back off. You explain how the critical path activities are the most important because they are the most difficult to find qualified professionals to do the work for. You explain how the activities on the critical path are critical because they are the most expensive activities in the project. You explain how the activities on the critical path have zero total float, so if any of them are delayed, it will cause the entire project to be delayed