Question: please show all calculation. Problem 2: US has decided to install an air cleaning system in its precision engineering lab during the summer term. The

please show all calculation. please show all calculation. Problem 2: US has

Problem 2: US has decided to install an air cleaning system in its precision engineering lab during the summer term. The lab will be unavailable to students during the installation. For this reason, the University does not want the installation to exceed 3 weeks. The following table details the required activities. What are the earliest start and finish, latest start and finish, and slack of each activity? Which activities are critical? Will the project complete in 3 weeks? Provide a network diagram for this problem. You can draw it by hand (neatly) and include its clear snapshot in your Word document. [10 Marks) Immediate Predecessor(s) - Activity A B D E F G H Description Building internal components Modify roof and floor Construct collection stack Pour concrete and install frame Build and connect ducts Install control system Install air pollution device Inspection and testing Time Estimate (days) 3 4 3 5 7 3 6 4 A B C C D,E,F G

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