             </li>
              <br />
              <li>
                <i>Histogram section - </i>by
                <a href="../histogram.html">the D3 graph gallery</a>
              </li>
              <br />
              <li>
                <i>Tooltip section - </i>by
                <a href="https://www.d3-graph-gallery.com/interactivity.html"
                  >the D3 graph gallery</a
                >
              </li>
            </ul>
          </div>
        </div>
      </div>
    </sectio