{"version":"1.0","type":"rich","title":"Chapter Exercises","description":"This example shows a smiley face drawn with SVG circles and a D3 arc path. The face is centered within an 960 by 500 viewport, using a yellow circle with a black stroke, two smaller circles for eyes, and a D3 `arc` generator for the mouth. The code uses React to render the SVG elements, with D3's `arc` API to define the mouth's inner radius, outer radius, and angular range. All positioning is calculated relative to the center using constants for eye offset and radius.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/9bc61c99dad442bc91a50be054ad9645?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}