You are the project manager for a construction company. Your firm has been contracted to complete the drilling of a well for a new cabin in Arkansas. The specification of the well is documented, but your company has little experience in well drilling in Arkansas. The stakeholder is concerned that your time estimates are not accurate since the soil and rock in Arkansas are quite different from the soil in your home state. Which of the following can you use to ensure your project estimates are accurate? An order of magnitude A commercial duration estimating database Local contractors Soil samplings from the Arkansas government