How do I write a long business report with an outline?

This is my following topic that I am suppose to write a long report on.

Marten Printing uses e-mail as its primary form of internal communication. This works quite well for most correspondence. However, there are times when you need an even faster response from employees than e-mail allows. Mark is considering using instant messaging within the business. Conduct research to determine how this would work, what instant messaging system would be best for your company’s needs, and what the cost would be. Present your findings and recommendations.

This report should be 4-5 pages which should include: cover page, table of contents, executive summary, body of report, and references. It should also include at least five citations, two side headings, and page number in the footer. The format should be 1.08 point line spacing; 1″ side and bottom margins, 8 point spacing after paragraphs, do not indent paragraphs, and 11 point font.

I am planning to use Skype for Business for instant messaging to write this report.