Q2 (5 marks) Use mixed integer linear programming to solve the problem regarding the monthly demancBuppose that holding cost is applied to the ending inventory. - Develop the mathematical model in the W'ord document. - Solve the problem in Excel . Develop a plan in the W'ord document and explain when and how many products should be ordered in order to minimise the total cost. - Recalculate the optimal value of objective function (total cost with the new assumption that the holding cost is applied to the average inventory (not ending inventory)