Answer:
21. an amendment may be proposed either by the Congress with a two-thirds majority vote in both the House of Representatives and the Senate or by a constitutional convention called for by two-thirds of the State legislatures
22. Freedom of Religion. Freedom of Speech. Freedom of the Press. Freedom to Assemble Peaceably. Freedom to Petition the Government for a Redress of Grievances.
23. Constitution outlines the relationship between the various states, as well as the relationship between each state and the United States federal government. It also empowers Congress to admit new states and administer the territories and other federal lands.