The job responsibilities of three employees of Barney Manufacturing are described next.

Tyranna Davis, cost accounting manager, is responsible for measuring and collecting costs associated with the manufacture of the purple stuffed dinosaur product line. She is also responsible for preparing periodic reports comparing actual costs with planned costs.

These reports are provided to the production line managers and the plant manager. Tyranna helps explain and interpret the reports.

Steg Swenson, production manager, is responsible for the manufacture of the purple stuffed dinosaurs. He supervises the line workers, helps develop the production schedule.

and is responsible for seeing that production quotas are met. He is also held accountable for controlling manufacturing costs.
Rex Anders, marketing manager, is responsible for selling and delivering the product to retail toy stores. He supervises the development of marketing materials and ad campaigns and oversees the sales force. He also supervises the delivery truck drivers. He is account¬
able for controlling all marketing-related costs.
Required:
Identify Tyranna, Steg, and Rex as line or staff and explain your reasons.