b$.$ Assume that the project completion time cannot be changed. $($Project cannot be delayed$).$ Also, assume that once an activity is started, it cannot be stopped. $($Once started, it needs to be completed$).$ Now, do a resource leveling. What is the maximum number of workers required? When does the maximun number of workers are required?

c$.$ Assume that the project completion time is flexible. Also, assume that once an activity is started, it cannot be stopped. $($Once started, it needs to be completed$).$ But now, there are only $4$ workers available at any given time. Perform resource$-$limited scheduling. What is the new completion time for the project?