5. Exercise Figure 5.1 is a project WBS with cost apportioned by percentages. If the total project cost is estimated to be $800,000, what are the estimated costs for the following deliverables? a. Design b. Programming c. In-house testing What weaknesses are inherent in this estimating approach? EXERCISE FIGURE 5.1 WBS Figure Router systems project Cost: $800,000 Definition Design Implementation 10% 40% 50% Objectives Requirements In-house Customer testing testing & review 4% 6% 40% 10% Inputs Outputs Files Interfaces Programming 3% 3% 3% 9% 22%