Измените предложение двумя методами так, чтоб использовать инфинитив цели

1. We study economics to work as managers.
We study economics in order to work as managers.
2. Farmers grow animals to produce meat and milk.
Farmers grow animals in order to produce meat and milk.
3. Factories and plants use fuel and energy to process resources.
Factories and plants use fuel and energy in order to process resources.
4. Companies produce goods to sell them.
Companies produce goods in order to sell them.
5. Mining gets minerals from the earth to provide resources for manufacturing.
Mining gets minerals from the earth in order to provide resources for manufacturing.
6. Factories process resources to sell them as goods.
Factories process resources in order to sell them as goods.
7. Economists make models to use them in economical analyses.
Economists make models to use them in order to use them in economical analyses.