Page 1 Page 2 fig.1Page 3 Fig.2Page 4 Fig.3Page 5 Fig.4Page 6 Fig.5Page 7 fig.6Page 8 Fig. 7Page 9 fig.8Page 10 Fig.9Page 11 Fig.10Page 12 fig.11Page 13 Fig.12Page 14 Fig.13Page 15 fig,.14Page 16 Fig.15Page 17 Fig. 16Page 18 Fig.17Page 19 Fig.18Page 20 Fig.19