Your company has implemented an organizational hierarchy consisting of two layers of folders and tens of projects. The top layer of folders corresponds to a department, and the second layer of folders are working groups within a department. Each working group has one or more projects in the resource hierarchy. You have to ensure that all projects comply with regulations, so you have created several policies. Policy A applies to all departments. Policies B, C, D, and E are department specific. At what level of the resource hierarchy would you assign each policy?