Answer:
If he gave 1 part to his friend then he will have 3 parts left. Is that what you needed help on?
I have no clue. What is it?
Answer: Commodity money
Explanation: has intrinsic value because it has other uses besides being a medium of exchange. Fiat money serves only as a medium of exchange, because its use as such is authorized by the government; it has no intrinsic value.