Trading in different currencies

Q: Zaid sent a parcel of GBP in cash to Bakr, with the intention of selling it to him for ZAR. Bakr inspected the notes, because some of them were old, and they both agreed on an exchange rate.

After a few days, Zaid subsequently sent his agent to collect ZAR notes from Bakr. Bakr did not give the entire amount. After a week, Bakr made an EFT of the remaining amount in ZAR.

(1) What is the status of the ZAR notes received from Bakr? If the money is haraam, what should be done with the money?

(2) What is the status of the money received via EFT from Bakr? If the money is haraam, what should be done with the money?

Loaning someone money and asking for a profit in return

Q: Is it permissible for me to lend someone money as a personal and ask for a profit in return. (The money will be used for business - I am not asking for a profit from the business).

The profit on the loan is fixed at 10% per annum. Then another 10% is added to the outstanding balance at the end of each year until fully paid. The term is fixed for 6 months to repay the loan.