You should have a folder called htmlpractise which holds three HTML pages and an image. You created it in the HTML practical section. Make a copy of it and call it csspractise. If you are in any doubt that you did that practise correctly you should probably go back and do it again as this CSS relies on those three pages being correct.
Open your CSS template and save it in the new folder as practisecss.css. In the three HTML pages change the style sheet from default.css to practisecss.css in the link element.
All of the styles requested by your client have been covered in the beginner's CSS tutorial so feel free to refer back to that.
Basically the client likes the pages but wants some colours and a bit more as explained on the next few pages. There are no specific changes for the first page.
Remember to comment your CSS code.