4. After reading the article by Wheelwright and Schmidt, (Scientific glass ) and in the context of the theory studied in the textbook (Jacobs & Chase ) chapter 20 (types and costs of inventory, inventory control models, inventory turnover, inventory control system, outsourcing and total cost of ownership),

a) identify and justify the inventory control model used by SG,

b) state the type and costs of inventory that SG presents,

c) identify and list the company's core and strategic activities, and the "total cost of ownership" for its warehouses, d) list the outsourcing decisions suitable for Sientific Glass, describing and justifying your recommendation.