.......................................................... 4-2 ....................................................... 4-4 ...................................... 4-8 ................................................. 4-9 .................................... 4-10 .................................... 4-12 ............................. 4-13 ......................................... 4-14 ............................................... 4-15 ............. 4-16 .................... 4-19 ................................................. 4-20 ...................... 4-25 ........................................................ 4-26 ............................................ 4-27 ....... 4-28 .................... 4-30 ....................... 4-32 .......................... 4-35 ................................................ 4-36 ........................... 4-37 ..................................... 4-44 ................ 4-47 ........................ 4-48