2. A project has the following activities: Normal Normal Crash Crash Immediate wwwtime Cost Time Cost Activity Predecessors (weeks) _ ($) (weeks) ($) A none 4 3,000 3 5,000 B 9 5,000 7 8,000 mmd 4 7,000 4 7,000 D B, C 6 6,000 4 8,000 E 8 4,000 6 8,000 F 3 4,000 2 9,000 G E, F 4 2,000 2 7,000 a) Draw the network diagram using AON (activity on node) format, based on normal time. b) What are potential paths and corresponding durations? c) What is the expected project completion time based on normal time? d) What is the most economical way and how much will it cost to reduce the completion time of the project by three weeks?