a a Assume you are the project manager and based on your customer's requirements you have determined there are four main tasks in a Dream Backyard project and have assigned each a TBC. Spec.sically, the customer wants the backyard leveled (Task 1 - $15,000); wants a covered outdoor kitchen with a hot tub and firepit (Task 2 - $20,000), a retaining wall with fencing built- in (Task 3 - $25,000), and a pool with waterfall (Task 4 - $60,000). You estimate this will take 5 weeks to complete. The costs are budgeted as follows: Task 1 Task 2 Task 3 Task 4 TBC 15 20 25 60 Budgeted Per Week (in 000's) 1 2 3 4 5 6 6 3 2 3 10 4 1 7 8 6 4 10 25 20 5 What is the total cumulative TBC? What is TBC at the end of week 4? . Assume 4 weeks have passed and these are the actual costs per week