How to create table using colspan and rowspan

In assignment 1, a question told me create a table structure as shown below using colspan and rowspan attributes. but I could not make the table. here is my code:-
But still using this code I could not make the same table as the question told me.

Introduction of Table table{ border: 1px solid; } table tr td, table tr th{ border: 1px solid; }
    <body>
           <caption>This a Table</caption>
       
          <table>
           <thead>
                  <tr>
                    <th>ID</th>
                    <th>FIRST</th>
                    <th>LAST</th>
                    <th>INCOME</th>
                    <th>ADDRESS</th>
                    <th>SAVING</th>
                  </tr>
           </thead>
              <tbody>
                      <tr>
                          <td rowspan="2">1</td>
                          <td colspan="2">ABC</td>
                      </tr>
                      <tr>
                        <!-- <td>1</td> -->
                        <td>AB</td>
                        <td>ABC</td>
                        <td>ABCD</td>
                        <td>ABCDE</td>
                        <td>ABCDEF</td>
                     </tr>

                     <tr>
                        <td>2</td>
                        <td>AB</td>
                        <td>ABC</td>
                        <td>ABCD</td>
                        <td>ABCDE</td>
                        <td>ABCDEF</td>
                     </tr>
                     
                     <tr>
                       <td>3</td>
                       <td>AB</td>
                        <td>ABC</td>
                        <td>ABCD</td>
                        <td>ABCDE</td>
                        <td>ABCDEF</td>
                   </tr>

                    <tr>
                       <td>4</td>
                       <td>AB</td>
                        <td>ABC</td>
                        <td>ABCD</td>
                        <td>ABCDE</td>
                        <td>ABCDEF</td>
                   </tr>

                    <tr>
                      <td>5</td>
                       <td>AB</td>
                        <td>ABC</td>
                        <td>ABCD</td>
                        <td>ABCDE</td>
                        <td>ABCDEF</td>
                   </tr>

                    
              </tbody>

              


          </table>

    </body>