Помогите написать 5 типов вопросов к предложению A receiver converts the signals into sounds which are then decoded.

Предыдущие ответы поразили незнанием грамматики! В Present Indefinite в вопросах окончание -s после глаголов не ставится. What does convert the signals into sounds which are then decoded? Does a receiver convert the signals into sounds which are then decoded? A receiver converts the signals into sounds which are then decoded,doesn`t it?

Does a receiver converts the signals into sounds which are then decoded? A receiver converts the signals into sounds which are then decoded, doesnt it? Why receiver converts the signals into sounds which are then decoded? Does a receiver converts the signals into sounds or sounds into signals which are then decoded? What converts the signals into sounds which are then decoded?