The following activities occur at Greenwich Corporation. a company that manufactures a variety of products a. Receive raw materials from suppliers. b. Manage parts inventories. c Do rough milling work on products d. Interview and process new employees in the personnel department e. Design new products. f. Perform periodic preventive maintenance on general-use equipment g. Use the general factory building. h. Issue purchase orders for a job. Required: Classify each of the activities above as either a unit-level, batch-level, product-level, or organization-sustaining activity. a. Receive raw materials from suppliers b. Manage parts in c. Do rough milling work on products. d Interview and process new employees in the personnel department new products f Perform periodic preventive maintenance on general-use g Use the general factory building h. Issue purchase orders for a job