Q1. A company has three warehouses (W1, W2, W3) supplying four retail stores (S1, S2, S3, S4) with the respective demands. The transportation costs per unit from each warehouse to each store are given a follows: The capacities of the warehouses and the demands of the stores are as follows: S1 S2 S3 S4 W1 3 5 7 6 W2 W3 2 4 6 8 3 5 6 7 Warehouse capacities: W1 100, W2 = 150, W3 = 200 Store demands: S1 80, S2 120, S3 70, S4=180 Find the initial solution to minimize transportation cost using minium cost method and improve the solution with transportation simplex algorithm to find optimal solution.