Google Table Merge columns
<p>I have a page that displays data in the form of a Table. I use Google Charts and here is the code:</p>

<pre><code>&lt;script type="text/javascript" src="https://www.google.com/jsapi"&gt;&lt;/script&gt;
&lt;script type="text/javascript"&gt;
      google.load("visualization", "1", {packages:["table"]});
      google.setOnLoadCallback(drawChart);
      function drawChart() {
        var data = google.visualization.arrayToDataTable([
         ['Task', 'Hours per Day', 'Test', 'Hours per Day', 'Test'],
          ['Work',     11, 12, 11, 12],
          ['Eat',      2, 13, 2, 13],
          ['Commute',  2, 15, 2, 34],
          ['Watch TV', 2, 17, 7, 24],
          ['Sleep',    7, 18, 2, 13]
        ]);

       var chart = new google.visualization.Table(document.getElementById('tablechart'));
       chart.draw(data);
      }
    &lt;/script&gt;
&lt;div id="tablechart" style="width: 700px; height: 400px; position: relative;"&gt;&lt;/div&gt;
</code></pre>

<p>And here's a working JS FIDDLE: <a href="https://jsfiddle.net/alex4uthis/kt21bf0k/" rel="nofollow noreferrer">https://jsfiddle.net/alex4uthis/kt21bf0k/</a></p>

<p>I would like to get the following format:
<a href="https://i.stack.imgur.com/s7dWL.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/s7dWL.jpg" alt="enter image description here"></a></p>

<p>(I would like to merge Jan and Feb same as in the image)<br>
Please advise...</p>