How to do this html table coding

Answer 1

You would learn for yourself if you start the HTML course here on sololearn. Anyways just have a look here.
https://www.sololearn.com/learn/HTML/1033/

Answer 2

In this example
<table> tag is used to create a table (environment).
and a table consists of rows and column.
<tr> tag is used (under <table> </table> tags) to add a row in the same table.
and if you want to add more blocks(cells) in that row use <td> tag.