Which of the following best describes the meaning of the multiplicities next to the number 6 in the preceding diagram?

1-Each Buy/Sell Transaction involves one Broker.

2-Each Buy/Sell Transaction involves many Brokers.

3-Each Buy/Sell Transaction involves a minimum of zero Brokers.

4-Each Buy/Sell Transaction involves a maximum of many Brokers.

5-Both "Each Buy/Sell Transaction involves one Broker" and "Each Buy/Sell Transaction involves a maximum of many Brokers" are correct.