1) If you mean Specialday (Joyce) owns 0 share of the Parent and 100 shares of the Daughter now, what's the number of outstanding shares of the Parent? 900 or 1000? What's the share price of the Parent after the split-off?

2) what's the share price of the Daughter after the split-off?

3) Could Specialday (Joyce) still own some shares of the Parent? e.g. 50 shares of the Parent and some shares (this number should be calculated relating to the whole value if the Daughter, right?) of the Daughter?

3x.