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. 

Love problems

Q: The problem I am facing is related to my love life. Is it going to get better? Is there any dua I can make or anything because currently I am going through this issue. It is affecting my present and future. Please let me know.

Making taubah from sharing animate pictures on whatsapp

Q: I shared a pic on whatsapp on which a girls picture was printed and on the bottom it was stated that it is Yahodi sazish. So one member informed me that it was wrong, so I deleted it and sent a message not to share it because it will give me gunah. I tried to message my groups and tell them not share it. If they share it then it is not my responsibility of gaining sin or gunah. I want to ask you that if anyone shares it, will I be sinful because I tried to stop it?