AlwaysOn Licensing

Hi Everyone, 

I would like to know how the SQL AlwaysOn licensing work for the below scenario. 

Scenario 1:

I set up two node cluster and created a two SQL Instances with one AG each.

Node A and Node B ( Each node has 2 physical CPUs )

SQL 1 and SQL 2 

If I run SQL 1 on Node A and SQL 2 on Node B. Do I need to pay the license for both the servers/4 CPUs? 

Scenario 2: 

Set up Two node cluster and created one SQL instance with two availability groups.

Node A and Node B ( Each node has 2 physical CPUs )

SQL 1 with AG1 and AG2

Now If I run AG1 on Node A and AG2 on Node B. Do I need to pay the license both the nodes/4 CPUs? 

Thanks.