[Graphics:calc4-12_6gr2.gif][Graphics:calc4-12_6gr16.gif]

[Graphics:calc4-12_6gr2.gif][Graphics:calc4-12_6gr17.gif]

[Graphics:calc4-12_6gr2.gif][Graphics:calc4-12_6gr18.gif]
[Graphics:calc4-12_6gr2.gif][Graphics:calc4-12_6gr19.gif] 

[Graphics:calc4-12_6gr2.gif][Graphics:calc4-12_6gr20.gif]