Income of a salesperson who swipes customers credit cards

Q: I work for company called NEXT who’s CEO has political support for Israel.

Also the company provides a credit card for the customers which has interest in it as well. As I work as a sales girl I have to be on the counter/till while on the till sometimes I have to take the credit cards from the customers as their means of payment.

Can you please tell me if my earning is halaal?

Spouses having a separate entrance to their section of the house

Q: I live with my in laws, and though I have a separate portion, bedroom, kitchen, and bathroom, my husband does not allow me to use the separate entrance or exit of that house portion. He forced me to use the door outside that goes through his parent's portion of the house.

Does Islam allow me to have a separate entry and exit from the house portion?

Earning interest to pay off an interest bearing loan

Q: I have a brother and a sister. My brother has taken a loan from a bank and has to pay back the loan with interest. My sister wants to open a fixed deposit with the intention of giving the interest earned on the fixed deposit to my brother so he can pay off his own loan. Can she do it, even when my brother has enough income to pay off the loan himself?