Glass Co LTD, PTY is a glass production company with plants throughout South Ekhuruleni in the east of Gauteng, Johannesburg. The production plants use raw various material for the production of different types of Glass products. Exogenous influence determines the material usage rate. To ensure continuous production of glass products, the company keeps an inventory of raw material. A supply delay of 5 months occurs between the ordering of additional raw material and its arrival in the inventory. To guard against inventory shortages, the production industrial engineer has decided to apply a formal material procurement policy of ordering exactly the amount of material consumed, therefore the order rate is equal to the usage rate. Assume the exogenously determined usage rate increase linearly with time. Applying your knowledge of system dynamics, provide solutions to the following production problems: (i) For 10 marks, Map the stock and flow structure, drawing on the following variables: Inventory, Raw Materials, Production, Order Backlog, Order Rate. (ii) For 10 Marks - Add sufficient commentary and explanation so that the meaning of each variable, the reasoning behind each formulation, and the data sources for each (iii) If parameter values are clear to your audience. For 10 Marks Describe, in writing, the rationale for each variable, formulation and sources for each parameter. Display your understanding of stocks, flows, etc