Qtext: The time - cost estimates for the various activities of a civil project are given below: Activity Crash Time Crash Cost Immediate Normal Time Normal predecessor (weeks) Cost ($) (weeks) ($) A 3 8000 2 19000 B - 8 600 6 1000 C B 6 10000 4 12000 D B 5 4000 2 10000 E A 13 3000 10 9000 F A 4 15000 4 15000 G F 2 1200 1 1400 t 6 3500 4 C.E. G H 4500 2 F 7000 1 I 8000 (a) Draw the project network diagram and find the critical path. (b) If the deadline of 17 weeks is imposed for completion of the project, which activities will be cra additional cost and find the critical path after crashing to 17 weeks? (2+