The Stock company sells 3m, 5m and 9m pieces of cardboards. The company's customers demand 25 pieces of 3m boards, 20 pieces of 5m boards and 15 pieces of 9m boards. The company produces cardboards in widths of 17m and wants to minimize the waste incurred. Formulate a cutting stock model to help the company accomplish its goal. i. Write the conceptual model. (5 points) ii. Clearly define your parameters and variables, write the model in compact (indexed) form. (10 points) iv. Write the ways (combinations) to cut a board for 3m, 5m and 9m boards, and waste for each combination. (5 points) v. Insert the values of the parameters into the model and write the model in open form. (10 points)