Debit note & credit note in gstr1 & gstr3b

A) We have issued Debit note to our customers (Buyer1) towards increase in basic rate

B) Also we have issued Credit Note to our Customer (Buyer 2) towards damaged material received by them.

My query is:

1. Can we show both Debit Note & Credit Notein CDNR worksheet in GSTR1?
2. Original invoice no. to be shown in this worksheet?
3. Note/Refund Voucher Number refers to Debit /Credit Note No.?
4. In GSTR3B , how to show debit note & credit note value

Please help