The Dryfus Company specializes in large construction projects. The company management regularly employs the Program Evaluation and Review Technique (PERT) in planning and coordinating its construction projects. The following schedule of separable activities and their expected completion times have been developed for an office building which is to be constructed by Dryfus Company. pg69

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Activity description a Excavation b Foundation c Underground utilities d Rough plumbing Predecessor activity Expected activity completion time (in weeks) e Framing b f Roofing g Electrical work f h Interior walls d. g Finish plumbing h f 23745334262 Exterior finishing k Landscaping Required: c. i.j a Identify the critical path for this project and determine the expected project completion time in weeks. b Briefly discuss how the "expected activity completion times" are derived in the PERT method and what the derived value for the expected activity completion time means in the PERT method. (CMA Adapted.)