I apologize, but I'm not sure what you mean by "peta sergeant." This phrase doesn't have a clear meaning in English or any common context I'm familiar with. Could you please provide more information or clarify your request? Are you perhaps referring to:

1. A specific person named "Peta Sergeant"?

2. A military rank similar to "sergeant" but with a prefix like "peta-"?

3. A typo of something else?

If you can give me more context or rephrase your question, I'll be happy to help you with the information you're looking for.