Level $1$ WBS for a construction project is given here:An empty building exists with a large hall type room on floors $1,2$ and $3.$ Your company has rented $2$nd and $3$rd floors for office space while shopping center needs to be located on floor $1.$ Parking lot needs to be finished in the empty basement $($floor $0).$You will need to decide who is to be located on floor $2$ and who should be located on floor $3.$For floors $2-3($Level $1$ WBS activities$)$Administrators office $($President$,$ Vice$-$President, Manager, Assistant manager, group leaders$)$Secretary office one for President, one for Vice$-$President, and one for the rest of managers and leadersEmployees offices to house $200$ employeesFacilities to house copier, printer, coffee, vending machines, and other daily needsDrafting roomAppropriate restroomsAnswer the following questions:For all level $1$ activities, decompose them down to the level at which the lowest$-$level activities can be completed.Estimate duration, cost, and resource requirements for above part of the WBS$.$ Please state any assumptions you have to make in order to complete this assignmentConstruct the project network diagram $($Precedence chart$).$ Calculate earliest start, earliest finish, latest start, and latest finish and critical path. Prepare a table similar to the one in the text book. If the project is not completed in $4$ months, compress the schedule using the tools defined in the text book.As project manager, what assumptions have you made about resources that will give you a good chance to bring this project in on time? Is overstaffing a possibility in anticipation of no$-$shows? How do you plan for overstaffing? Give your cost for your resources and show when they will be used on the current WBS