Increase keyword density for articles & submission to ezine etc.

Hi, I have 60 articles to increase keyword density. 1. We will provide a link to an existing article we have written and the keyword we want to target. 2. You will then need to do minor modifications e.g increase the keyword density , adding anchor text to the main body or if not allowed, then author bio area. 3. Submit the article via ezine article, isnare etc.. 4. You DO NOT need to rewrite. Just change a words to our keywords e.g 4-5 times per article is good enough. Budget:- $15 fixed. Regards!!