In a representative democracy, the people elect a leader to represent them. So the answer should be President/Prime Minister, depending on which country you're from.
1)Which system did the new government created under the Constitution use?
Answer
The federal republic model.
Explanation
in the Federal model the powers are shared between the national government and local governments .
Federal means belonging or relating to the national government of a federal country rather than to only one state within it.
