Adding custom CSS to Blogger Post

Publish the post, then go to Theme > Customize > Advanced > Add CSS > then paste your custom table css here. To make the tables look like you see below, I added the following CSS:

table, th, td {
  border: 1px solid black;
  border-collapse: collapse;
}
th, td {
  padding-left: 5px;
  padding-right: 5px;
  text-align: left;
}

Name:	Bill Gates
Telephone:	55577854
	55577855

Thanks to the help from https://support.google.com/blogger/thread/29091352?hl=en,