What versions and editions can be used for setting up replication?

Hi Team,

Can anybody help me knowing what versions can I have replication for Publisher , Subscriber and Distributor.
Do I need to have all 3 servers as same sql server version or can I mix the versions ? what are Limitiations if I have lower and higher versions and what are the recommendations?

Question 1 :
What possible SQL Versions can I have for Publisher   ?
What possible SQL Versions can I have for Subscriber  ?
What possible SQL Versions can I have for Distributor ?

Question 2:
Also, is there can I have mix of Enterprise and Standard and Express Editions for Publisher, Subscriber and Distributor?

Thanks in advance.