I want to get table data by XPath

I would like to use XPATH to retrieve table data.
The table data is as follows:
"At this time, you can specify ""number of people"" and ""average height"" by entering the following, but I don't know how to get ""5"" and ""170"" underneath them, so I would like to ask you a question."

/table/tr [td [contains (normalize-space(), "average height")]]

*We would like to use the same XPATH for the number of people and average height except within

<table>
  <tr>
    <td>Number of people</td>
    <td>Average Height</td>
  </tr>
  <tr>
    <td>5</td>
    <td>170</td>
  </tr>  
</table>