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This example shows a simple smiley face drawn with SVG shapes, composed of a yellow circle for the face, two black circles for eyes, and a computed arc path for the mouth. Rendering occurs through a React component that uses JSX to define the SVG elements. The code relies on React 16.13.1 and ReactDOM for mounting, while the mouth arc is generated using the `d3.arc` API from d3.v7. The layout is static, with hardcoded dimensions and positions for each shape.