Problem 2 - Client Centric Consistency Models (20 points): A client is the only reader and writer of a data item X. Client moves between locations L1 and L2. A server at each location has a replica of the item X and also stores X's local version number (generation). The client reads and writes are always performed locally. A read operation R also returns the local version number of the item X. The initial version number of each copy is equal to 0. A write W increments the (local) version number by 1. PW is an update operation to the remote copy (initiated after a local W). PW carries the version number of X and stores it with the update. The time line goes from left to right. For each sub-problem