The optimization model for the QAP does not consider feasible location limitations for the objects $($for example: in a layout with $9$ locations, Object $1$ is only allowed to be placed in Location $4,6,$ or $9$ etc.$).$ Reformulate the general optimization model such that it considers feasible location restrictions for the objects. Give the generic model formulation. Define all additional symbols used and give all equations $($objective function and$/$or constraints$)$ that need to be updated or added.