Converted by
Mathematica
June 17, 2001
![[Graphics:../Images/Pratica7_gr_161.gif]](../Images/Pratica7_gr_161.gif)
![[Graphics:../Images/Pratica7_gr_162.gif]](../Images/Pratica7_gr_162.gif)
![[Graphics:../Images/Pratica7_gr_163.gif]](../Images/Pratica7_gr_163.gif)
![[Graphics:../Images/Pratica7_gr_164.gif]](../Images/Pratica7_gr_164.gif)
![[Graphics:../Images/Pratica7_gr_165.gif]](../Images/Pratica7_gr_165.gif)
![[Graphics:../Images/Pratica7_gr_166.gif]](../Images/Pratica7_gr_166.gif)