$4\mathrm{.}2$ Determine the relationship between unit cost and size for the project data shown in Problem $4\mathrm{.}1,$ to estimate the cost of a $25,000-$sf project.

$4\mathrm{.}3$ Use the time and location indices presented in this chapter to estimate the cost of a building that contains $48,000$ sf of floor area. The building is to be constructed $3$ vears from now in City $C.$ The cost of a similar type of building that contained