Do not need to draw 6-cell network. Only specify activity number, three cell probabilistic time.

2.1 The Porsche Shop, founded in 1985 by Dale Jensen, specializes in the restora- tion : vintage Porsche automobiles. One of Jensen's regular customers asked him to prepare an estimate for the restoration of a 1964 model 356SC Porsche. To esti- mate the time and cost to perform such a restoration, Jensen broke the restoration process into four separate activities: disassembly and initial preparation work (A), body restoration (B), engine restoration (C), and final assembly (D). Once activity A has been completed, activities B and C can be performed independently of each other; however, activity D can be started only if both activities B and C have been completed. Based on his inspection of the car, Jensen believes that Table 1 reflects time estimates in days. Table 1: Problem 2.4 Activity Optimistic Most Probable Pessimistic A 3 4 8 B 5 8 11 2 4 6 D 4 5 12 N a. Develop a project network. b. What is the expected project completion time