P'igu~e7 7: Internal p n r l of thr systerri response ixoiii Example 7.0 10 30 20 I I I 40 50 60 70 80 90 100 80 90 100 t Figure 7.8 Extcrrinl part of tlr 30 r - 10 I 20 - -r 30 I 40 -1 50 t 60 70 Figure 7.9:Corrrplete solution of Kxairiplr 7.9