Wang and Nushi are colleagues working on the same project for a banking app. Wang created the visual and functional interface elements of the app, and Nushi created the prototype.

Which of the following statements is correct about Wang and Nushi?

Both Wang and Nushi are UX designers of the app.

Wang is the UX designer, and Nushi is the UI designer of the app.

Wang is the UX designer, and Nushi is the visual designer of the app.

Wang is the UI designer, and Nushi is the UX designer of the app.