Returning to one's husband after a divorce

Q: My father has recently passed away and he got murdered brutally by a man who hit him on his head with a knife and then slit his throat whilst my dad was still alive. I loved my father very much and it feels to me that somebody has killed me brutally. I am worried that my father may be in pain or discomfort in his grave. I read surah mulk at night but I feel very restless.

Also I have recently been divorced (1 year ago) but my husband gave me verbal divorce and now he says that he can bring me back only if at the cost that I accept his terms and conditions once being that I may not be able to work for a while. I don't want to go back to my husband as I hate him now and I want to consider someone else (my colleague) who gives me the respect I deserve and loves me. What do I need to do in this situation? If I don't go back to my husband, would it be a sin? I feel frustrated that I haven't done enough for my dad and he may be suffering... I can't sleep and I have arthritis and fibromyalgia which aggravated my muscular pain when I am in stress. Sometimes I just think that I should die as all this frustration and worry for my father is killing me and I feel helpless. 

Marital problems

Q: I have a friend who is passing a very hard time in her marriage. She got married by force of her family to a person who does not give her respect she deserves. I know in Islam, a wife should fulfil every need of her husband. But if the husband is not respecting his wife, he is using her only for his pleasure. My friend cries everyday because of physical and mental torture she bears by her husband. She has not yet started feeling love for her husband and when she asked him not to touch her now, he insists, then he forces her to have sexual relations with him.

My friend is going into deep depression day by day, and she can't even talk to anyone about it. She asked me if I know any dua that can prevent her husband to touch his wife. I said to her, in my belief there is no such dua that exists. But I feel feel sad for her thats why I am contacting a mufti to help me with a solution so that I can give her some relief.

Eating restaurant foods

Q: It is common that for a person to achieve taqwa and progress on the pathway towards Allah Ta'ala, a person is advised to stay away from eating 'out' food. My question is, which aspect about "eating out food" makes it doubtful and should keep us away from it.

Wearing a Taweez

Q: 

1. Is taweez shirk?

2. Is it proven that a person can wear a taweez as protection knowing that Allah is the protector.

3. Will reading 7 times surah alam nashra help in exams? 

Classmates taking pictures of an exam paper from the teacher's laptop

Q: In our class some boys took an exam paper from our teachers laptop when he was out and they took pictures of it and maybe that is the same paper which the teacher is going to give us for the final exam. They did a wrong thing. I didn't have the courage to stop them. What should I do now? If I complain then all the boys will be saying bad words to me and they will mock me etc. But I dont need sin. And maybe if they dont get that paper then they will fail and maybe need to repeat the whole year (so much time and money will go to waste waste). What should I do? 

Investing in a company that is partnered with a company that deals in haraam

Q: I had a question regarding finance in islam, specifically investing in cryptocurrencies. I understand that it is only halal to invest in companies that do not deal with any haram acts such as interest or alcohol. However, I was curious to know, if company A, for example, is completely halal in its goals but is partnered with company B that is not halal such as a banking company, is it still halal to invest in company A?

I had a friend call a local sheikh who stated that it is halal to invest in company A since the goal of the company itself, for example to build an education platform, is completely halal even though company A is partnered with company B that is not halal. I just wanted to verify this information with another sheikh to put my mind at peace since I do still have some small amount of doubt.