How to Create a Simple HTML Table

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Table</title>
    <link rel="stylesheet" href="style.css"></a>
</head>
<body>
 <table border="1">
    <tr>
        <th rowspan="9">Department</th>
        <th rowspan="4">ec</th>
        <th>sub1</th>
    </tr>
    <tr>
        <td>sub2</td>
    </tr>
    <tr><td>
        sub3
    </td></tr>
    <tr>
        <td>sub4

        </td>
    </tr>
    <tr>
        <td rowspan="5">
            hi
        </td>
    </tr>
    <tr>
        <td>
            sub1
        </td>
    </tr>
    <tr>
        <td>
            sub2
        </td>
    </tr>
    <tr>
        <td>sub3</td>
    </tr>
    <tr><td>
        sub4
    </td></tr>

 </table>
</body>
</html>
Simple table by using html
