Husband being forced to sign a talaaq document

Q: My husband's parents forced him to sign a divorce paper. They prepared it by themselves and he doesn't know how many has been written. He didn't have any intention for this. Is it valid? 

They threatened him that his mother will kill herself while his wife put a pistol on her daughter. He did not know how many times divorce was written because he didn't prepare and read the papers, nor was he willing to sign.

Minimum number of people for Jumuah Salaah to be valid

Q: The masjid in our area is fairly new. We have, for Jumu'ah, about just over a dozen musallis. It is a mixed congregation of Shaafi and Hanafi. Our imaam for Salaah passed away in September. Since then, while we are looking into appointing a new Imaam, we have invited other Ulama to conduct Jumuah. 

The last imam who came, informed us that our Jumuah is problematic as per Imam Shaafi, there should be at least 40 men. 

Is it correct? Or can we continue with Jumuah Salaah?

Getting a panic attack when performing salaah in the masjid

Q: I have problem. Last year I had a panic attack while performing salah. From that day I am unable to pray salah in a masjid. Whenever I went for salah in the masjid, my situation becomes very worse. A lot of times I had to cut my salah and come home and then I performed salah at home. 

My question is, can I perform my salah at home till my situation becomes good.