怎样做到纵向合并的同时横向合并(标签-html)

求解问题：我遇到的问题，怎样做到纵向合并的同时横向合并？
问题：用html怎样实现

img


我目前做到

img


<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        table,tr,th,td{
            border: 1px solid;
        }
        table{
            width: 300px;
            height: 300px;
            border-collapse: collapse;
        }
    </style>
</head>
<body>
    <table>
         <tr>
            <td rowspan="2">1</td>
            <td  colspan="2">2</td>
         </tr>
         <tr>
            <td>3</td>
            <td rowspan="2">5</td>
         </tr>
         <tr>
            <td colspan="2">4</td>
           
         </tr>
    </table>
</body>
</html>