Replace an image in existing powerpoint with .jpg

I have a presentation with 4 slides. Each slide has a picture and 3 text boxes. I want to replace the pictures on each slide with different pictures I have stored in another folder, but I don't know how to call out the slide and picture I want to replace and perform the action. Also, I would like to replace the 3 text boxes with new text.

[Rik]

improve your chances of getting an answer. Have a read here and here. It will greatly improve your chances of getting an answer.

What you describe consists of many individual steps. It is not clear which one you tried and which is causing you issues to implement.