SUBJECT: Homework Assignment #7Remember Joan? The owner representative for the Library project. The project has moved through design, the contract type selected, and the project was put out to bid. A variety of subcontracts were developed by the General Contractor for the project. One was for site work.One particular work package in the site work subcontract involved foundation excavation and piping installation. This work package integrated with the foundation work package (footings are part of the concrete subcontract)Joan was really getting into the construction activities associated with the project. As such, she wanted to verify some of the subcontract estimates. She chose the foundation excavation work package.Joan called Chuck with several questions to get her started on estimating the cost of the trenching work package. Later that day, Chuck dropped off several tables with the rest of the information required to complete the bid estimate, along with a short note:Table 1 Expected productivity and equipment cost*Note: Job Efficiency Factor is already included in these productivitiesTable 2 Required LaborTable 3 Cost SummaryExcavation: Swell Factor = 25% (when excavated, the soil expands by 25% into Loose Cubic Yards)Compaction: Bedding Material Shrinkage = 6.8% (when compacted, bedding shrinks 6.8%)Backfill Shrinkage = 10.8% (when compacting backfill, it shrinks 10.8%)Trench is 2000 feet long.You are Joan, so: prepare a memo to Chuck for the foundation excavation work package estimate setting out your calculations, results, and suggestions for the estimate of the excavation. Your solution should include the following information: