Answer:
1. The 3/5 compromise was important to the do it because it meant they would be able to get more votes on people they wanted to run. If the compromise had not been made their would of have been more tariffs then there were when the 3/5 compromise was in place.
2A. We the people who fought for liberty cannot agree in Congress unless they enslave those who helped fight for liberty.
2B. "allowed Congress to tax imports (including slaves)" they were just objects to Congress to tax. "Count three-fifth of their slaves" meaning a slave wasn't even a full person.
2C. His opinion shows us that he was against slavery.