493204.fig.002a
(a)
493204.fig.002b
(b)
493204.fig.002c
(c)
493204.fig.002d
(d)
Figure 2: Graphs of the approximate solutions of (40), (a) for , , and various values of and , (b) for , , and various values of and , (c) for , , and various values of and , and (d) for , and , , , and .