Interest bearing loans & Transactions

Giving a loan on interest

Q: Two parties want to enter an agreement: Person A wants to loan money to Person B. 

The amount is marked up by 10% and the repayment is over a fixed period e.g. 4 years. 

If there is a clause in the agreement to say that if you pay by 3 years, you will get R2000 back. 

Is the rebate of the R2000 clause permissible? Is the allocation of marked up shares permissible?

Taking an interest-bearing loan to study

Q: I have a great academic background and I want to continue my studies abroad. The country I am currently living in is Afghanistan, so my financial circumstances are not good and for continuing my studies I am not going to be able to pay for my education expenses. 

Can I get a loan and this loan has been accompanied by interest. Studying abroad is my dream and I can make my future through this. So can I get the loan?

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?