The activities required to design a prototype of an experimental machine are listed in the following table, along with their immediate predecessors and estimated durations.

(a) Develop a project network for this problem.
(b) Determine the EST, EFT, LST, LFT, and slack for each activity. Also determine the total project completion time and the critical path(s).

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IMMEDIATE PREDECESSORS TIME (DaYs) ACTIVITY C, E D, F