Which of these sentences uses the word requisite correctly?

the emperor was known for his courageous and requisite spirit.
the wettest region on earth receives requisite showers.
nikita didn’t get the job because she didn’t possess the requisite skills.
jennifer was profusely apologetic for her requisite behavior.
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One of the author's purposes in the code book is to explain different types of codebreaking to his readers. which line best demonstrates this purpose? a theoretical breakthrough would be a fundamentally new way of finding alice's private key mathematicians have been studying factoring for centuries, and modern factoring techniques are not significantly better than ancient techniques a more recent development is the so-called tempest attack, which aims to detect the electromagnetic signals emitted in a computer's display unit if scientists could build a quantum computer, it would be able to perform calculations with enormous speed mark this and return save and exit next submit

This is a set of words that begins with a preposition.

What is the message? how does langston hughes convey the message in this poem?