Question 1
David and Mei are siblings. David has 1 child/ren: Kavya; Mei has 1 child/ren: Yuki. How many cross-cousins does Kavya have? (Cross-cousins are children of mother's brother or father's sister)
Kavya is child of David (father's side), so cross-cousins are children of his father's sister Mei: 1 cousins.