Which of the following is a power of the president?

Ineed on 2-4 i want y’all to reply to this question so i can turn this into my teacher tomorrow

Judicial independence is a cornerstone of democracy because it ensures that the courts reach fair and unbiased decisions. judicial independence is maintained in which of the following ways? select all the apply. 1points a judges are appointed rather than elected. b judges serve life terms on good behavior. c judges can overturn the rule of law.

Why did einstein write a letter to president roosevelt