Kindly solve in a simple way

Question 1(30%) Peaches are to be transported from three orchards to two retailers. The orchard supplies and the retailer demands for the next month are as follows: The transportation cost (in dollar per unit) from the orchards to the retailers are shown below: (For example, it costs $12 per unit to ship from Riverside to Sanderson, and etc) Based on the information provided, answer the following questions. 8% a) Draw a network representation of this transportation problem. 12% b) Formulate a linear programming model that can be used to determine the optimal shipment plan that minimizes total transportation costs. (Please do not attempt to solve for the optimal shipment plan) 10% c) What changes would have to be made in the linear programming model in part b) i Millville's demand increases from 2000 to 3000 ? Explain your rationale. (Hint: you can use dummy supplier if needed)