Ребят, плииз. даю 40 баллов
Найдите в каждом предложении глагол-сказуемое и определите его видо-временную форму и залог.
1) In the last ten years production of barley has doubled
2) Many years ago higher yields were produced by cultivate of new lands
3) Potatoes are planted two or free inches deep
4) Agronomists are working on an important problem now

Заранее спасибо

Has doubled - Pr.perfect - Active voice

Were produced - Past Simple - Passive voice

Are planted - Pr.Simple - Passive voice

Are working - Pr.Continuous - Active voice

Удачи)