When buyers purchase new houses, they are frequently responsible for installing their own landscaping. The PERT/CPM network shown in the accompanying figure represents a landscaping project for a new...

When buyers purchase new houses, they are frequently responsible for installing their own landscaping. The PERT/CPM network shown in the accompanying figure represents a landscaping project for a new home in Jackson, Mississippi. The times are in days.

a. What are the expected completion time and the critical path for the landscaping project?

 b. What are the earliest and latest start and finish times for activity C?

c. How long can activity A be delayed without delaying the minimum completion time of the project?

d. If activities A, C, and F are each delayed three days, how long will the landscaping project be delayed?