What article the Constitution helps establish a mixed Constitution by vesting all judicial powers solely in the Judicial Branch?

Article 3

The United States Constitution establishes a mixed constitution by dividing powers among three branches of government: the legislative, the executive, and the judicial. Article 3 of the Constitution specifically vests all judicial powers in the Judicial Branch. This separation of powers is a fundamental principle of the U.S. Constitution, ensuring a balance of power and preventing any single branch from becoming too powerful.