In a project network diagram with activities A, B, C, D, and E, the durations and dependencies are as follows: Activity A takes 5 days and can start immediately. Activity B takes 8 days and can't start until A is finished. Activity C takes 10 days and can't start until A is finished. Activity D takes 6 days and can't start until both B and C are finished. Activity E takes 7 days and can't start until D is finished. Calculate the total float (i.e., slack) for Activity D. 7.2) In a project network diagram with activities A, B, C, D, and E, the durations and dependencies are as follows: Activity A can start immediately and takes 5 days. Activity B depends on the completion of A and takes 8 days. Activity C depends on the completion of A and takes 10 days. Activity D depends on the completion of B and C and takes 6 days. Activity E depends on the completion of D and takes 7 days. Draw a CPM node diagram. What is the total duration of the project? What is the Critical Path?