This example demonstrates a grouped, stacked bar chart that visualizes average scores (AVG_A, AVG_B, AVG_C) for different module groups (CAM, CIS, VGA, DES) and module codes. The chart uses D3.js v5 with the `d3.stack`, `d3.scaleBand`, and `d3.scaleLinear` APIs to render SVG rectangles, with a `d3-tip` tooltip for hover interactions. The data is structured in JavaScript arrays, and the layout includes axis labels and a color scale from `d3.scaleOrdinal`.