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 unit$-$level, batch$-$level, product$-$level, or facility$-$level.

Hiring personnel

Managing parts inventory

Purchasing

Testing prototypes

Designing products

Setting up equipment

Training employees