Make one tiny precise edit to this six-topic workbook image only in the rhythm cell in the lower left. Preserve all six exact headings and the entire rest of the image. There is one long horizontal navy bar above two short horizontal navy bars. The two bottom short bars currently have a visible blank gap. Remove that gap completely. Draw the bottom as one full continuous navy bar matching the top long bar's exact left and right endpoints, with only a thin pink vertical divider line at its exact midpoint to show two equal halves. Each half is half of the long duration. No extra text. Leave every other image detail unchanged.