Q. how to do a power point on gmail

Are you asking how to create a PowerPoint type presentation using Google Slides?

I am going to link you to instructions from Google on how to insert objects into slides below.

I'm linking to a YouTube video that shows you how to insert sound into your presentation.

If you need to convert it to PowerPoint format before you turn it in, from the File drop down menu, chose Download, then the PPT option. I included a link to help with that, as well.

The last link is to Google Slides help in general, in case you have more questions.