Очень безотлагательно нужно, на данный момент делаю. Кто знает?3. Fill in

Очень безотлагательно необходимо, на данный момент делаю. Кто знает?
3. Fill in the blanks with the prepositions, if necessary.
1. ... a mixed economy the government may be a producer... private goods, for example, steel and motor cars.
2. An increase ... the price ... an input will lead to a reduction ... the demand ... that input.
3. The firm can sell as much as it wants ... the market price.
4. A consumer's tastes and income as well as prices ... other goods influence ... his or her demand.
5. Consumers almost always respond to an increase ... a good's price ... a education ... the quantity ... it consumed ... them.
6. A change ... the supply ... a good and ... its demand both influence ... its equilibrium price.
7. Rupert Murdoch, the media magnate, is planning to supply the services ... his network ... satellites ... Internet development. If Internet is operated ... satellites, there will be access ... it ... televisions and mobile phones, not only ... personal computers, ... the near future.
8. ... a command economy, plans are imposed ... producers ... government agencies.
9. Scientists and engineers have been developing substitutes ... natural building materials ... several past decades.
10. Supplying people ... food as well as industry ... raw materials, agriculture is ... utmost importance ... an economy.