Smiley Face Part 1
A yellow smiley face is rendered as an SVG graphic, composed of a large yellow circle with a black stroke, two black eye circles, and an arc-shaped mouth. The visualization uses React to manage the component structure and D3’s `arc` generator to define the mouth path’s inner and outer radii and angular range. All coordinates are calculated relative to the center of the 960x500 viewport, with the face positioned using a translate transform.