DONT GIVE ANSWER I JUST NEED SOMEONE TO EXPLAIN WHAT THE QUESTION IS ASKING

Bill lent some money to his two brothers. He wrote down the amounts so he would not forget. The list shows the younger brother with −$18.50 and the older brother with $0. Which of the following statements best describes the amounts?

The older brother paid Bill $18.50, and the younger brother does not owe him any money.
The older brother owes Bill $18.50, and the younger brother does not owe him any money.
The younger brother paid Bill $18.50, and the older brother does not owe him any money.
The younger brother owes Bill $18.50, and the older brother does not owe him any money.