Syntax for .htaccess

I can’t seem to figure out the correct syntax to restrict access to three key WP files in htaccess: wp-config.php, upgrade.php, install.php

Should I make one entry like this:

<files wp-config.php, upgrade.php, install.php>
order allow,deny
deny from all
</files>

Or three separate entries, one for each file?

<files wp-config.php>
order allow,deny
deny from all
</files>

<files upgrade.php>
order allow,deny
deny from all
</files>

<files install.php>
order allow,deny
deny from all
</files>

Or ???

Thx!!