Article Writing

I need 25 articles written in conversational english. They will consist of the following: 1. I will provide titles and topics (wide range of topics) 2. proper keyword density 3. 350-450 words 4. non-plagarized Will provide edits if necessary. The project will not be paid until the work is completed or unless I terminate the project early. (The only reason I will terminate the project is if I am unsatisfied with the performance.) Please provide sample of work and time for completion. Thank you.