................................................................................. 3 .................................................................................................. 4 ............................................................................................................... 4 ........................................... 4 ..................................... 5 .......................................................................................... 5 ............................................................................................................... 5 ............................................................................................................ 6 ................................................................................... 9 ........................................................................................................... 9 .................................................................................................................. 10 ............................................................................................................ 13 ....................................................................................................... 13 ........................................................................................................................ 13 .................................................................................................................. 14 ....................................................................................................................... 14 ....................................................................................................................... 14 .................................................................................................... 14 ..................................................................................................................... 15 .............................................. 16 .............................................................................................. 17