A family of Microsoft word processing software products for creating web, email, and print documents.
Click at the end of the 4th page.
Activate the Page Layout tab of the ribbon.
Click Breaks and select Next Page under Section Breaks.
Go into the header of the second section (on page 5) and click the Link to Previous button to turn it off.
Do the same for the footer.
Click Page Number | Format Page Numbers...
Specify that the page number (for the second section) starts again at 1, then click OK.
You can now set the header and footer of the first and second sections independently of each other.