Brief Exercise 17-12 Spin Cycle Architecture uses three activity pools to apply overhead to its projects. Each activity has a cost driver used to allocate the overhead costs to the projects. The activities and related overhead costs are as follows: initial conceps formation $41.500 design $308,000; and construction oversight $124,600. The cost drivers and expected use are as follows. Expected Use of Cost Drivers per Activity Cost Drivers Initial concept formation Design Construction oversight Number of project changes Square fot Number of months 174,000 95 (a) Compute the predetermined overhead rate for each activity. (Round overhead rate per square foot to 2 decimal places, e.g. 2.25 and all other answers to 0 decimal places, e.g. 1,225.) Overhead Rate Initial concept formation Design Construction oversight (b) Classify each of these activities as unit-level, batch-level, product-level, or facility-level. per project change per square foot Per month Level Inal concept formation Design Construction oversight