Section by the plane z=2

[Graphics:hypparagr2.gif][Graphics:hypparagr11.gif]

[Graphics:hypparagr2.gif][Graphics:hypparagr12.gif]

[Graphics:hypparagr2.gif][Graphics:hypparagr13.gif]

[Graphics:hypparagr2.gif][Graphics:hypparagr14.gif]
[Graphics:hypparagr2.gif][Graphics:hypparagr15.gif]