1. Please prepare the models for this: A transportation problem involves the following costs, supply, and demand: To (cost) From - 2 3 4 Supply $500 $750 $300 $450 12 W N - 650 800 400 600 17 400 700 500 550 11 Demand 10 10 10 10 2. Please prepare the models for this:To (cost) From 2 W Supply A $ 6 $ J $ 4 100 B 180 5 7 200 Demand 135 175 170 3. Please prepare the models for this: To (cost) From 2 3 Supply $ 6 $100 130 B 12 5 70 4 11 100 Demand 80 110 60