Per Jon Heyman on Twitter, the figures for the Rangers players are as follows:
Mike Napoli asked for $11.5 million, the Rangers offered $8.3 million
Nelson Cruz asked for $7.5 million, the Rangers offered $5.5 million
Elvis Andrus asked for $3.6 million, the Rangers offered $2.65 million
Matt Harrison's arbitration figures aren't out yet, but I will update this when they become available.
My guess is that all four players end up settling their cases prior to arbitration. The last time the Rangers had a case go to arbitration was when Doug Melvin was g.m., and Lee Stevens had his case go to the arbitrator. Of the four potential cases, Mike Napoli's would seem the most likely to go to arbitration, but I suspect all of them will work something out.
UPDATE -- Per Evan Grant, Matt Harrison has asked for $3.5 million, and the Rangers have offered $2.45 million.