This bar chart displays scores for four individuals, Simon, Mary, Jo, and Peter, using blue vertical bars on an SVG. The chart builds with D3 v7, using `d3.scaleBand` for the x-axis categories and `d3.scaleLinear` for the y-axis range from 0 to 100. Axes are rendered with `d3.axisBottom` and `d3.axisLeft`, with custom tick formatting for names. The hardcoded data is bound via `selectAll` and `join`, and the SVG includes a viewBox for responsive sizing.