Name the cost driver that might be used to assign overhead costs to products

Company manufactures four products in a single production facility. The company uses activity-based costing. The following activities have been identified through the company's activity analysis: (a) inventory control, (b) machine setups, (c) employees training, (d) quality inspections, (e) materials orderings, (f drilling operations, and (g) building maintenance. For each activity, name a cost driver that might be used to assign overhead costs to products