[Graphics:calc4-12_6gr2.gif][Graphics:calc4-12_6gr6.gif]

[Graphics:calc4-12_6gr2.gif][Graphics:calc4-12_6gr7.gif]
[Graphics:calc4-12_6gr2.gif][Graphics:calc4-12_6gr8.gif]

[Graphics:calc4-12_6gr2.gif][Graphics:calc4-12_6gr9.gif]