Converted by
Mathematica
June 22, 2001
![[Graphics:../Images/Pratica8Sol_gr_114.gif]](../Images/Pratica8Sol_gr_114.gif)
![[Graphics:../Images/Pratica8Sol_gr_115.gif]](../Images/Pratica8Sol_gr_115.gif)
![[Graphics:../Images/Pratica8Sol_gr_116.gif]](../Images/Pratica8Sol_gr_116.gif)