Repeat the same process until you have created a slide for each interview.  
Then, go back to the first slide and test all of your audio links.
To test a link, click on the <Slide Show> icon to view your presentation.
While you are in slide show mode and testing your audio, you may notice adjustments that you want to make to text and images. To adjust text or move or resize a graphic, first press the <Esc> button on your keyboard,
then switch to <Normal View>.