1. At the bottom of layout.css, insert formatting that changes the background color of the navbar links when the mouse pointer hovers on top of them:

    .navbar li a:hover {
    background: #ffff00;
    color: #000000;
    }
  2. Save format.css and index.html.
  3. Preview index.html in the browser.

    Rest the cursor on the PDAs link.

    It should look like this:

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