A company has four factories that ship products to five warehouses. The shipping costs, requirements and capacities are shown in the following table

	Shipping cost ($/case) to
From	w1	w2	w3	W4	W5	Capacity ($,000)
F1	4	12	16	20	24	80
F2	8	8	4	16	20	60
F3	4	20	4	12	4	50
F4	20	8	16	20	16	50
Demand ($,000)	60	70	50	30	40

4.1 Give the steps that you follow when you determine the initial solution using the North West Corner Method. Give as four steps only. (4)

4.2 Give the steps that you follow when you determine the initial solution using Vogels Approximation Corner Method. Give as four steps only. (4)

4.3 Use the North West Corner Method to find an initial solution. (5)

4.4 Use the Vogels Approximation Method to find an initial solution. (12)

Total [25]