помогите, совсем не понимаю залоги

[артем]

Перепишите предложения, выпишите сказуемые, определите их видовременную форму и залог, в скобках укажите инфинитив глагола. Переведите предложения на русский язык.
Образец:
The article was being translated the whole day long.
was being translated - Past Continuous Passive (to translate)
Статью переводили целый день.
а)
1. Have the buyers confirmed payment?
2. Our company produced electronic components for washing machines.
3. The company will continue its marketing policy in future.
4. The company’s profits are constantly increasing.
5. They had been producing Model 5 for five years before they developed Model 5A.
б)
1. Now solar energy and its usage are being studied by a lot of research groups.
2. The plant had been built by the time I moved to this town.
3. Money received from selling goods or services is called the turnover.
4. The new model of the device will be worked at in the plant laboratory.

[English Guru]

а)
1. Have the buyers confirmed payment?
have confirmed - present perfect active (to confirm)
Покупатели подтвердили платёж?

2. Our company produced electronic components for washing machines.
produced - past simple active (to produce)
Наша компания производила электронные компоненты дл стиральных машин.

3. The company will continue its marketing policy in future.
will continue - future simple active (to continue)
Компания продолжит свою маркетинговую политику в будущем.

4. The company’s profits are constantly increasing.
are increasing - present continuous active (to increase)
Доходы компания постоянно растут.

5. They had been producing Model 5 for five years before they developed Model 5A.
had been producing - past perfect continuous active (to produce)
Они производили модель 5 в течение 5 лет до того, как они разработали модель 5a

б)
1. Now solar energy and its usage are being studied by a lot of research groups.
are being studied - present continuous passive (to study)
Новая солнечная энергия и её использование изучаются многими исследовательскими группами.

2. The plant had been built by the time I moved to this town.
had been built - past perfect passive (to build)
Завод построили к тому времени, как я переехал в этот город.

3. Money received from selling goods or services is called the turnover.
is called - present simple passive (to call)
Деньги, полученные от продажи товаров или услуг называются товарооборот.

4. The new model of the device will be worked at in the plant laboratory
will be worked - future simple passive (to work)
Над новой моделью данного устройства будут разработать в заводской лаборотории.

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[артем]

спасибо большое