Donating the proportionate amount that was received from haraam income

Q: I had a job in a large clothing store. My job was a mixture of cleaning floors, folding and hanging clothes, moving boxes around containing clothes, working on the cash registers and so on.

The problem is that a few of the items contained haram imagery, like cartoons, which were somewhat like Greek mythology and such very haraam stuff, nike is a famous similar example. And part of the job required me to work with these items here and there. I tried to avoid them as much as possible, I wanted to quit but I had a lot of difficulty finding a job as I'm a student.

Also I didn't know for a long time if this company was going to be selling these kinds of items. So I have repented and I think I should donate the money I earned from the haraam items which was very little to begin with as most sales were from plain products.

Also, due to covid-19, I lost that job and because I was paying taxes, I now receive government assistance, which I'm depending on to get me through possibly more than an entire year and even more perhaps as I am a poor student. I have some savings from the job and mostly from government assistance. Total sales from these haraam items were probably much less than 2% or even 1% and even much less were actually paid to me. But should I donate from my job savings only or from job savings and also the government assistance? How much should I donate and where should I give my donation?

Man counseling his female friend

Q: I am friends with a girl who is going through a lot of struggle mentally, this is happening since 2 years. I have been trying to help her and I have been listening to her cry most of the time. This has started affecting my mental health. As our Prophet (sallallahu alaihi wasallam) said to be there for a friend when the friend is sad and going through mental suffering. I wanted to know if it is right if I start distancing myself from her problems and start focusing on my mental health. She cries out to me and dumps her problems on my head and this is effecting me mentally. I just want to know if it will be right if I stop talking to her.

Buying shares in a company where 5% or less of the company investment is in haraam activities

Q: In order to buy stock shares, I have seen a ruling that says that only 5% or less of a company investment should be in haraam activities like alcohol, interest, etc. How can we say that when Allah has asked us to completely stay away from them? Will investing in Islamic banks be halaal if they follow these guidelines?

Pictures of silhouettes, limbs of a person and pictures with no face

Q: I draw and paint for a hobby but I am confused on this topic Islamically due to many different opinions. Is it permissible to:

1. Draw a full body picture without the eyes, nose and mouth?

2. Draw a limb on its own. (e.g. a hand holding a flower). But it is connected to the end of the paper. Does it have to be drawn severed?

3. Draw a full body with an umbrella covering the head?

4. Draw silhouettes of living creatures e.g. humans, birds, etc. (If this is not permissible then can I draw birds as a 'm' shape in the distance?)