In the book Maraqi al Falah by Imam Shurunbulali the following text appear about the qunut in witr:

If the imam begins the supplication, “Allah, guide us …” as we shall mention, after the statement that has preceded, “Allah, we seek Your assistance …”, Abu Yusuf, Allah be merciful to him, said that he follows him and also reads it with him. Muhammad says that he does not follow him in it nor in the witr supplication that is “Allah, we seek Your assistance and we seek Your forgiveness”, but utters amen to his supplication.
I want ask some clarifications about his. I assume what is ment with “Allah, we seek Your assistance …” are the duaas ''Allahumma inna nastainuka.... & Allahumma iyyaka na'budu...'' and with “Allah, guide us …” it is the duaa ''Allahummahdina fiman hadayt...''.

1) In the view of Aby Yusuf does the imaam and the followers read both duaas i.e. “Allah, we seek Your assistance …” & “Allah, guide us …” silently of loudly ?

2) In the view of Imam Muhammad does the imaam read it loudly ? Also in the view of Imaam Muhammad does the followers recite the duaa “Allah, we seek Your assistance …” ? I ask this because in this duaa there is no part on which amin can be offered, since amin should be offered to duaas in which we are ask for something right ?

I request that you clarify both views of Abu Yusuf and Imaam Muhammad. I also want to ask what the view of Abu Hanifa in this matter ?