Hello, may you kindly advise what's the "System of record" used by fields defined in "case type" instead of other data objects?

Pls refer to attached picture for a sample data model list for GoGoRoad, downloaded from a Pega challenge, pls be noted the two red circles, my questions as below:

1. In first red circle, row 12-16, may I know whether the "Pega Database" in row 12 is applied for row 12 -16 ,  or,  just for row 12 only and row 13-16 without "System of record"?

2. I add row 18-20 myself, for sample fields in the case type "Assistance Request" without any reference, e.g. Address and Invoice total, may I know, as in 2nd red circle, what's their "System of record"?

Thanks.