4 Unit Shipping Costs Store Warehouse 1 5 2 3 3 2 4 6 3 3 6 4 3 5 4 2 Units Shipped Store Warehouse 1 A company has three warehouses that supply four stores with a given product. Eact warehouse has 30 units of the product. Stores 1,2,3, and 4 require 20,25,30, and 35 units of the product, respectively. The per unit shipping costs from each ware house to each store are given in the following table: Store Warehouse 1 3 1 54 6 2 3 6 4 3 4 3 3 a Draw the network representation of this problem. What kind of problem is this b. Formulate an LP model to determine the least expensive shipping plan to fill thu demands at the stores 5 4 2 3 4 Shipped Available 30 30 30 3 Received Needed 20 25 30 35 Total Cost