JSFiddle - React, Tailwind, and code Playground

HTML

<html>
<body>

<TABLE border="1" >

<CAPTION><EM>A test table with merged cells</EM></CAPTION>

<TR>
    <TH colspan="2"> Average</TH>
    <TH rowspan="2">Red<BR>eyes </TH>
</TR>
<TR>
  <TH>height</TH><TH>weight</TH>
</TR>
<TR> 
  <TD>1.9<TD>0.003<TD>40%</TD>
</TR>
<TR> 
  <TD>1.7<TD>0.002<TD>43%</TD>
</TR>

</TABLE>
</body>
</html>