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An electric utility is planning its annual project of shutting down one of its steam boilers...

An electric utility is planning its annual project of shutting down one of its steam boilers for maintenance and repair, an analysis of this project has identified the following principal activities and their expected times and relationships.

Activity Time: (Days): Immediate: Predecessor

A: 4: --

B: 3: --

C: 4: --

D: 6: A

E: 3: A

F: 5: C

G: 4: D

H: 6: A,B,F

I: 2 :E,G,H

Calculate the scheduling times for each activity

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