Letter to Steven Miron, of Bright House Networks, James Dolan, of Cablevision Systems Corporation, Thomas Rutledge, of Charter Communications, Brian Roberts, of Comcast Corporation, Patrick Esser, of Cox Communications, Michael White, of DIRECTV, Joseph Clayton, of Dish Network, Robert Marcus, of Time Warner Cable, Lowell McAdam, of Verizon Communications, and Randall Stephenson, of AT&T - Questions on Set Top Box Marketplace