Question about upgrade from 7.1.0.Bx to 7.1.2

I installed the 7.1 Beta but I cannot remember if it's B1 or B2.  

Two questions:

1.  How do I determine the version I'm on ?

2. I want to upgrade to the most current version but not sure if I need to upgrade from:

 - 7.1.0.B1 to 7.1.0.B2

 - 7.1.0.B2 to 7.1.0

 - 7.1.0 to 7.1.1

 - 7.1.1 to 7.1.2

or can I go from 7.1.0.Bx to 7.1.1 and then from 7.1.1 to 7.1.2 ?

1. 

SELECT * FROM  `sys_options` WHERE  `Name` LIKE  'sys_tmp_version';

2. Apply all upgrades starting with the version determined in item 1.