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35. A mango-processing unit produces mango juice only during the four months mangoes are har vested. The following diagram shows the production capacities in liters, demand for juice in liters production cost per liter of juice in rupees shown above the arrows and holding cost of juice per liter per month in rupees shown to the right of vertical arrows. 3 Demand 450 Capacity Production 600 Month 1 Node 1 Demand Month 1 Node 5 0.5 350 4 450 Production Month 2 Node 2 Demand Month 2 Node 6 0.5 550 5 600 Production Month 3 Node 3 Demand Month 3 Node 7 0.5 500 4 500 Production Month 4 Node 4 Demand Month 4 Node 8 The objective of the processing unit is to determine a production scheduling and inventory policy to minimize the combined production and holding costs. a. Formulate a linear programming model for the problem using the network concept. b. Solve the problem using computer