clarification about source system and some fields in FBDI Templates in oracle fusion supply planning

Summary:

we are using FBDI templates to upload data in fusion after extracting from EBS.
while creating source system code in task manage trading community source system, there are 2 types;
1.spoke
2.purchased
Which type to choose acc to our scenario and what impact it will have on plans outcome and on integration in later stages?if i chose purchased here and my version as EXTERNAL in Manage planning source system, are the choices correct or i should chose spoke and EXTERNAL?

Also in calendar template, a field named calendar quarterly type is there with these options:
1- 4/4/5 week pattern
2 - 5/4/4 week pattern