Riverbed Cycle Architecture uses three activity pools to apply overhead to its projects. Each activity has a cost driver used to assign the overhead costs to the projects. The activities and related overhead costs are as follows: initial concept formation $47,760; design $286,000; and construction oversight $121,900. The cost drivers and estimated use are as follows. (a) Compute the predetermined overhead rate for each activity. (b) Classify each of these activities as unit-level, batch-level, product-level, or facility-level