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Otto Dieffenbach & Sons Inc. is a small manufacturing company that uses activity-based costing. Dieffenbach & Sons accumulates overhead in the following activity cost pools. For each activity cost pool, indicate whether the activity cost pool would be unitlevel, batchlevel, productlevel, or facilitylevel. 1. Hiring personnel V 2. Managing parts inventory V 3. Purchasing V 4. Testing prototypes V 5. Designing products V 6. Setting up equipment V 7. Training employees V 8. Inspecting machine parts V 9. Machining V 10. Assembling V