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The following set of jobs must be processed serially through a two-step system. The times at each process are in hours. If Johnson's Rule is

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The following set of jobs must be processed serially through a two-step system. The times at each process are in hours. If Johnson's Rule is used to sequence the jobs then the makespan time (in hours) for all iobs is A. 90 hours. B. 42 hours C. 95 hours D. 53 hours

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