Assume that you have a NoSQL database with 3 nodes and a configurable replication factor (RF). R is the number of replicas that participate to return a Read request. W is the number of replicas that need to be updated to acknowledge a Write request. In each of the cases below explain why data is consistent or in-consistent for read requests.

1. RF=1, R=1, W=1.

2. RF=2, R=1, W=Majority/Quorum.

3. RF=3, R=2, W=Majority/Quorum.

4. RF=3, R=Majority/Quorum, W=3.