Activity Immediate Predecessor Time (weeks) A Prepare Requirements Spec -- 06 B Prepare Design Spec -- 08 C Prepare Development Team A, B 12 D Develop & Test Module 1 C 04 E Develop & Test Module 2 C 06 F Develop & Test Module 3 D, E 15 G Conduct Comprehensive Sys Test E 12 H Refine & Hand Over System F, G 08

6.1. Develop a PERT network for the project [14]

6.2. Identify the critical path. [02]

6.3. Determine the total project duration. [02]

6.4. Identify three activities that can be delayed and for each, determine the slack. [03]