OPC UA server to PLC Simulator connectivity |Miscellaneous|Forum|OPC Foundation

Hello OPC Team,

My questions are,

Qs 1) What are the WAGO PLC simulators we can use if in case we don´t have PLC in hardware form?
Qs 2) If I use PLC Simulator with my PC. Which operating system does it require “Linux” or “Windows” Operating System?
Qs 3) I wanted to use OPC UA communication protocol to communicate two WAGO PLCs. Does this thesis would be possible to be done by using WAGO PLC simulator or do I need a Hardware?
Qs 4) I am following the tutorial from Eclipse website that “How to build Forte For WAGO” (https://www.eclipse.org/4diac/…..n_help.php). Does this tutorial procedure is helpful with what I wanted to achieve in Questions 1 and Question 3? 

Any help will be very appreciated
Thanks 
Obaid