The delegates compromise was the great compromise (also known as the new jersey plan) in which the house would be divided into the house of representatives where the number of representatives would be based on population and the senate where each state would be given 2 representatives. This led to the problem of slaves and such the 3/5 compromise was born where a slave counted as 3/5 of a person.
To have complete control over all economic happenings
It was the year of the great gold rush my dude goodluck
Single member districts and a winner-take-all voting system. Hope this helps!