548920.fig.004a
(a)
548920.fig.004b
(b)
548920.fig.004c
(c)
548920.fig.004d
(d)
548920.fig.004e
(e)
548920.fig.004f
(f)
548920.fig.004g
(g)
548920.fig.004h
(h)
548920.fig.004i
(i)
Figure 4: The graph of as .